Welcome to the definitive engineering guide for electrifying your Cube bicycle. As a drivetrain systems specialist, I have designed this manual to be the most accurate, mistake-proof, and authoritative resource available. Whether you are converting a rugged aluminum Reaction hardtail or a carbon fiber Agree C:62, the success of your build depends entirely on understanding your frame’s mechanical tolerances. Mid-drive motors exert immense torsional forces on a bicycle frame. Before ordering a single component, you must identify your exact Cube model and understand its bottom bracket standard. Let us begin by establishing the foundational rules and technical concepts required for a safe, professional-grade conversion.
01 Cube Compatibility Overview
| Cube Model | Cube Category | Suitability Status | Approved Motor | Key Engineering Notes |
|---|---|---|---|---|
| Aim / Aim Pro / Aim ONE | MTB (Hardtail) | 🟢 Perfect | DM01 / DM02 | Aluminum HPA; 73mm BSA. Check SIC mount clearance on smaller frame sizes. |
| Reaction (Aluminum, All) | MTB (Hardtail) | 🟢 Perfect | DM01 / DM02 | Aluminum HPA; 73mm BSA. Watch internal cable exits at BB shell. |
| Sting / AMS (Aluminum) | MTB (Hardtail) | 🟢 Perfect | DM01 / DM02 | Aluminum HPA; 73mm BSA. Drop-in compatible. |
| Access WS (Aluminum) | MTB (Hardtail) | 🟢 Perfect | DM01 / DM02 | Aluminum; 73mm BSA. Women’s XC hardtail; drop-in compatible. |
| Analog / Flying Circus | MTB (Hardtail) | 🟢 Perfect | DM01 / DM02 | Aluminum; 73mm BSA. Dirt jump — verify motor housing clears frame geometry on smaller sizes. |
| Elite C:68X (All) | MTB (Hardtail) | 🟠 Advanced | DM02 ONLY | C:68X carbon; BB92 press-fit, 92mm wide, 41mm bore. 100mm axle + CNC bushings + spacer kit + interface pads. |
| Reaction C:62 (Carbon) | MTB (Hardtail) | 🟠 Advanced | DM02 ONLY | C:62 carbon; 73mm BSA threaded. No bushings needed but full carbon protocol applies. |
| Stereo 140 / 150 / 160 (Aluminum) | MTB (Full-Sus) | 🟡 Moderate | DM01 / DM02 | Aluminum; 73mm BSA. Suspension clearance test mandatory. |
| Stereo 180 (Aluminum) | MTB (Full-Sus) | 🟡 Moderate | DM01 / DM02 | Aluminum; 73mm BSA. Long-travel — suspension clearance test especially critical. |
| Stereo 120 HPA (Pre-2018) | MTB (Full-Sus) | 🟢 Perfect | DM01 / DM02 | Aluminum; 73mm BSA threaded. Drop-in compatible for pre-2018 frames only. |
| Stereo 120 HPA (2018+) | MTB (Full-Sus) | 🟡 Moderate | DM01 / DM02 | Aluminum; BB92 press-fit. 100mm axle + CNC bushings + spacer kit. Suspension clearance test mandatory. |
| Stereo ONE22 HPA (Aluminum) | MTB (Full-Sus) | 🟡 Moderate | DM01 / DM02 | Aluminum; BB92 press-fit, 92mm wide, 41mm bore. 100mm axle + CNC bushings + spacer kit. Suspension clearance test mandatory. |
| Stereo ONE44 C:62 / ONE55 C:62 | MTB (Full-Sus) | 🟠 Advanced | DM02 ONLY | C:62 carbon; 73mm BSA threaded. No bushings needed but full carbon protocol + suspension clearance test. |
| Stereo ONE77 C:68X | MTB (Full-Sus) | 🟠 Advanced | DM02 ONLY | C:68X carbon; 73mm BSA threaded. Full carbon protocol + suspension clearance test mandatory. |
| TWO15 (Downhill) | MTB (Full-Sus) | 🔴 NOT REC. | None | 107mm DH-specific press-fit shell. No Toseven axle variant exists for this width. Not convertible. |
| Attain (Aluminum) | Road | 🟢 Perfect | DM01 / DM02 | Aluminum; 68mm BSA. Drop-in compatible. Excellent commuter conversion candidate. |
| Agree (Aluminum) | Road | 🟢 Perfect | DM01 / DM02 | Aluminum; 68mm BSA. Drop-in compatible. |
| Axial WS (Aluminum) | Road | 🟢 Perfect | DM01 / DM02 | Aluminum; 68mm BSA. Drop-in compatible. |
| Attain C:62 / GTC (Carbon) | Road | 🟠 Advanced | DM02 ONLY | C:62 carbon; BB86 press-fit. 100mm axle + CNC bushings + spacer kit + interface pads. |
| Agree C:62 (Carbon) | Road | 🟠 Advanced | DM02 ONLY | C:62 carbon; BB86 press-fit. 100mm axle + CNC bushings + spacer kit + interface pads. |
| Axial GTC Pro / SL / SLX (Carbon) | Road | 🟠 Advanced | DM02 ONLY | Carbon; BB86 press-fit, 86.5mm wide, 41mm bore. 100mm axle + CNC bushings + spacer kit + interface pads. |
| Litening C:68X (Air / Pro / Race) | Road | 🟠 Advanced | DM02 ONLY | C:68X carbon; BB86 press-fit. 100mm axle + CNC bushings + spacer kit + interface pads. |
| Litening Aero C:68X | Road | 🔴 NOT REC. | None | Aero tube profiles prevent motor clearance. Fully internal routing incompatible. |
| Aerium C:68 / Aerium TT | Road | 🔴 NOT REC. | None | TT/triathlon aero profiles. Motor housing cannot be correctly positioned. |
| Cross Race (Aluminum) | Gravel | 🟢 Perfect | DM01 / DM02 | Aluminum; 68mm BSA. Drop-in compatible. |
| Nuroad (Aluminum, All Variants) | Gravel | 🟡 Moderate | DM01 / DM02 | Aluminum; BB86 press-fit despite aluminum construction. 100mm axle + CNC bushings + spacer kit. Do not assume BSA. |
| Cross Race C:62 / C:68X (Carbon) | Gravel | 🟠 Advanced | DM02 ONLY | C:62 / C:68X carbon; BB86 press-fit. 100mm axle + CNC bushings + spacer kit + interface pads. |
| Nuroad C:62 (Carbon) | Gravel | 🟠 Advanced | DM02 ONLY | C:62 carbon; BB86 press-fit. 100mm axle + CNC bushings + spacer kit + interface pads. |
| Kathmandu / Pro / SLX | Trekking | 🟢 Perfect | DM02 Recommended | Aluminum; 68mm BSA. DM02 strongly recommended over DM01 for trekking drivetrains. |
| Touring / Touring Pro | Trekking | 🟢 Perfect | DM02 Recommended | Aluminum; 68mm BSA. DM02 strongly recommended. |
| Hyde / Hyde Race | Trekking | 🟢 Perfect | DM02 Recommended | Aluminum; 68mm BSA. DM02 strongly recommended. |
| Nature / Nature Pro / Allroad / ONE | City / Urban | 🟢 Perfect | DM02 Recommended | Aluminum; 68mm BSA. Drop-in compatible. Ideal urban conversion platform. |
| Town / Town Pro | City / Urban | 🟢 Perfect | DM02 Recommended | Aluminum; 68mm BSA. Drop-in compatible. |
| Frame Material | Bottom Bracket Standard | Approved Motor | Required Axle | Mandatory Hardware |
|---|---|---|---|---|
| Aluminum | Threaded (BSA 68mm or 73mm) | DM01 or DM02 | 68mm / 73mm | Standard Kit |
| Aluminum | Press-Fit (BB86 / BB92) | DM01 or DM02 | 100mm | CNC Reducer Bushings + Spacer Kit |
| Carbon (C:62 / C:68X) | Threaded (BSA 73mm) | DM02 ONLY | 73mm | Protective Interface Pads (35–40Nm Limit) |
| Carbon (C:62 / C:68X) | Press-Fit (BB86 / BB92) | DM02 ONLY | 100mm | CNC Bushings + Spacer Kit + Interface Pads |
DM01 (160Nm): This motor is STRICTLY PROHIBITED on all Cube carbon fiber (C:62 and C:68X) frames. The extreme torsional force of 160Nm is high enough to crush the carbon layup and permanently destroy the bottom bracket shell.
DM02 (90Nm): This is the ONLY approved motor for carbon frames. You must use protective interface pads and strictly adhere to a 35–40Nm lockring torque limit.
Essential Hardware Checklist
- CNC High-Precision Reducer Support Bushings Mandatory for all Press-Fit (41mm bore) shells — BB86 and BB92 — to bridge the 7.5mm mechanical gap between the smooth bore and the motor axle.
- 1mm / 2mm Precision Spacer Kit Mandatory for all 100mm axle installs to ensure perfect motor centering and prevent axle bottoming out.
- Protective Interface Pads Required for all carbon (C:62 / C:68X) frames to distribute clamping loads and prevent resin fractures.
- Precision Torque Wrench Non-negotiable for carbon builds to maintain the strict 35–40Nm lockring limit.
Critical Operational Rules
- The 3-Second Calibration Rule You must keep all weight off the pedals for at least 3 seconds after powering on the T24 display to allow the torque sensor to establish a zero-load baseline.
- Manual Shifting (DM02) Since the DM02 lacks an integrated shift sensor, the rider must consciously pause pedaling during gear changes to protect the drivetrain.
- Suspension Clearance Test For all full-suspension models — Stereo 120 HPA (2018+), Stereo 140, 150, 160, 180, ONE22, ONE44, ONE55, ONE77 — you must deflate the rear shock and compress the linkage fully to ensure it does not strike the motor housing at any point in the travel arc.
- Year-Specific Verification (Stereo 120 HPA) The Stereo 120 HPA uses BSA 73mm threaded before 2018 and BB92 press-fit from 2018 onwards. You must physically inspect the shell or verify your model year before ordering any hardware.
TWO15 (Downhill): The TWO15 uses a 107mm DH-specific press-fit shell — a dedicated downhill standard completely separate from BB86 or BB92. No Toseven motor axle variant reaches 107mm. Conversion is not possible with any current Toseven hardware.
Litening Aero and Aerium: Conversion is Not Recommended due to deep aerodynamic tube profiles that prevent correct motor positioning and fully internal cable routing that cannot be rerouted around the motor block.
DM01 on Carbon: Use of the 160Nm DM01 motor on any carbon Cube frame — C:62 or C:68X — is Strictly Prohibited. It will crush the bottom bracket shell beyond repair.
Category 1: Mountain Bikes — Hardtail
Cube’s hardtail mountain bike lineup spans aluminum HPA and C:68X carbon construction. The aluminum platforms are among the most straightforward conversion candidates in this guide. The carbon Elite C:68X and Reaction C:62 require careful attention.
Aim / Aim Pro / Aim ONE
- Bottom Bracket Type BSA 73mm Threaded
- Frame Material Aluminum HPA
- Hub Spacing Boost 148mm
- Internal Routing Semi-internal, exiting near the bottom bracket.
Compatibility Verdict: ✅ Easy. The BSA 73mm shell natively accepts the 73mm Toseven motor with no adapter hardware required. Both DM01 and DM02 are highly recommended.
Technical Note: The Aim lineup features Cube’s SIC Mount (Side-Integrated Carrier mount) integrated into the chainstay near the BB shell. On smaller frame sizes, verify that the motor housing does not obstruct the SIC mount plate before finalizing installation.
Reaction (Aluminum, All Variants)
- Bottom Bracket Type BSA 73mm Threaded
- Frame Material Aluminum HPA
- Hub Spacing Boost 148mm
- Internal Routing Internal, exiting directly at the bottom bracket area.
Compatibility Verdict: ✅ Easy. One of the best hardtail conversion platforms in the Cube lineup. Robust HPA construction handles the DM01’s full 160Nm output without issue.
Technical Warning: Internal derailleur and brake cables exit through ports located directly at the BB shell. Rotating the motor upward against the downtube without first routing these cables around the motor body will crush the cable housing between the motor casing and the frame. Use protective rubber conduit around the cable exit ports and verify all cables route cleanly around the motor block before tightening any locknuts.
Sting / AMS (Aluminum)
- Bottom Bracket Type BSA 73mm Threaded
- Frame Material Aluminum HPA
- Hub Spacing Boost 148mm
Compatibility Verdict: ✅ Easy. Fully drop-in compatible. Both DM01 and DM02 are recommended.
Access WS (Aluminum)
- Bottom Bracket Type BSA 73mm Threaded
- Frame Material Aluminum
- Hub Spacing Boost 148mm
Compatibility Verdict: ✅ Easy. The Access WS is Cube’s women’s XC trail hardtail and uses a standard BSA 73mm threaded shell. Both DM01 and DM02 are compatible. The DM02 is a natural pairing for the trail-oriented riding style of this platform.
Analog / Flying Circus (Dirt Jump)
- Bottom Bracket Type BSA 73mm Threaded
- Frame Material Aluminum
- Hub Spacing Non-Boost 135mm
Compatibility Verdict: ✅ Easy. The Analog and Flying Circus use standard BSA 73mm threaded shells. Both DM01 and DM02 are compatible from a hardware standpoint.
Technical Warning: Dirt jump geometry is compact — shorter wheelbase, tight main triangle, small frame clearances. Before tightening any hardware, physically verify that the motor housing does not contact the downtube, seat tube, or chainstays when rotated into its braced position. Smaller frame sizes are tighter than they appear.
Elite C:68X (All Variants — Carbon Hardtail)
- Bottom Bracket Type BB92 Press-Fit (92mm width, 41mm bore)
- Frame Material C:68X Carbon
- Hub Spacing Boost 148mm
Compatibility Verdict: ⚠️ Advanced. The Elite C:68X uses a BB92 press-fit shell in a carbon frame — the most demanding hardware combination in the Cube hardtail lineup. You must use the 100mm axle motor variant, CNC High-Precision Reducer Support Bushings, the 1mm / 2mm Precision Spacer Kit, and protective interface pads. The DM01 is strictly prohibited. DM02 only, 35–40Nm lockring limit.
Reaction C:62 (Carbon Hardtail)
- Bottom Bracket Type BSA 73mm Threaded
- Frame Material C:62 Carbon
- Hub Spacing Boost 148mm
Compatibility Verdict: ⚠️ Advanced. The BSA 73mm threaded shell requires no reducer bushings — the motor axle drops directly into the frame. However, the C:62 carbon construction means the DM01 is strictly prohibited. You must use the DM02, install protective interface pads between the motor housing and the carbon downtube, and limit the primary lockring to 35–40Nm.
Category 2: Mountain Bikes — Full Suspension
Cube’s full-suspension lineup spans aluminum and carbon variants across two bottom bracket standards. All full-suspension models carry a mandatory suspension clearance test requirement — no exceptions, no shortcuts.
Stereo 140 / 150 / 160 (Aluminum)
- Bottom Bracket Type BSA 73mm Threaded
- Frame Material Aluminum HPA
- Hub Spacing Boost 148mm
- Internal Routing Internal, exiting at the BB area.
Compatibility Verdict: ⚠️ Moderate. BSA 73mm threaded shell — no adapter hardware required. Both DM01 and DM02 are compatible. The suspension clearance test is mandatory before tightening any mounting hardware. Cube’s lower swingarm linkage sweeps forward as the suspension compresses and will strike the motor casing if clearance is not physically confirmed at full bottom-out.
Stereo 180 (Aluminum)
- Bottom Bracket Type BSA 73mm Threaded
- Frame Material Aluminum
- Hub Spacing Boost 148mm
Compatibility Verdict: ⚠️ Moderate. The Stereo 180 is Cube’s long-travel enduro platform and uses a BSA 73mm threaded shell consistent with the rest of the aluminum Stereo family. No adapter hardware required. Both DM01 and DM02 are compatible. The suspension clearance test is especially critical on this platform — 180mm of rear travel means the lower linkage sweeps through a significantly wider arc than shorter-travel models.
Stereo 120 HPA (Pre-2018)
- Bottom Bracket Type BSA 73mm Threaded
- Frame Material Aluminum
- Hub Spacing Boost 148mm
Compatibility Verdict: ✅ Easy. BSA 73mm threaded shell. The standard 73mm Toseven motor drops in with no adapter hardware. Both DM01 and DM02 are compatible. Suspension clearance test mandatory.
Stereo 120 HPA (2018+)
- Bottom Bracket Type BB92 Press-Fit (92mm width, 41mm bore)
- Frame Material Aluminum HPA
- Hub Spacing Boost 148mm
Compatibility Verdict: ⚠️ Moderate. The shell changed to BB92 press-fit — 92mm wide, 41mm smooth bore. You must order the 100mm axle motor variant, install CNC High-Precision Reducer Support Bushings, and use the 1mm / 2mm Precision Spacer Kit. Both DM01 and DM02 are compatible on this aluminum frame. Suspension clearance test mandatory.
Critical Warning: You must verify your specific model year before ordering any hardware. Remove the existing bottom bracket and physically inspect the shell — a smooth bore means press-fit (2018+), visible threads mean BSA (pre-2018).
Stereo ONE22 HPA (Aluminum)
- Bottom Bracket Type BB92 Press-Fit (92mm width, 41mm bore)
- Frame Material Aluminum HPA
- Hub Spacing Boost 148mm
Compatibility Verdict: ⚠️ Moderate. Same hardware requirements as the Stereo 120 HPA (2018+) — 100mm axle, CNC bushings, precision spacer kit. Both DM01 and DM02 are compatible. Suspension clearance test mandatory.
Stereo ONE44 C:62 / ONE55 C:62 (Carbon Full-Suspension)
- Bottom Bracket Type BSA 73mm Threaded
- Frame Material C:62 Carbon
- Hub Spacing Boost 148mm
Compatibility Verdict: ⚠️ Advanced. The BSA 73mm threaded shell requires no reducer bushings. However, the C:62 carbon frame means the DM01 is strictly prohibited. DM02 only, 35–40Nm lockring limit, protective interface pads mandatory. Suspension clearance test mandatory.
Stereo ONE77 C:68X (Carbon Full-Suspension)
- Bottom Bracket Type BSA 73mm Threaded
- Frame Material C:68X Carbon
- Hub Spacing Boost 148mm
Compatibility Verdict: ⚠️ Advanced. Identical protocol to the ONE44 and ONE55: BSA 73mm threaded shell, no reducer bushings required, but DM01 is strictly prohibited. DM02 only, 35–40Nm lockring limit, protective interface pads mandatory. Suspension clearance test mandatory.
TWO15 (Downhill)
- Bottom Bracket Type 107mm DH Press-Fit
- Frame Material Aluminum
Compatibility Verdict: ❌ Not Compatible. The TWO15 uses a 107mm DH-specific press-fit shell — a dedicated downhill standard that exists entirely outside the BB86 and BB92 family. The shell is 107mm wide with a smooth bore. No Toseven motor axle variant currently reaches 107mm. Conversion is not possible with any existing Toseven hardware. Do not attempt electrification on this platform.
Category 3: Road Bikes
Cube’s road lineup requires precise attention because aluminum and carbon variants of the same model name use completely different bottom bracket standards. Verify your exact variant before ordering anything.
Attain (Aluminum) / Agree (Aluminum) / Axial WS (Aluminum)
- Bottom Bracket Type BSA 68mm Threaded
- Frame Material Aluminum
- Hub Spacing Non-Boost 130mm–142mm depending on variant
Compatibility Verdict: ✅ Easy. BSA 68mm threaded shell — the 68mm Toseven motor drops in with no adapter hardware. Both DM01 and DM02 are compatible. These are excellent commuter and light adventure conversion candidates.
Attain C:62 / GTC / Agree C:62 (Carbon)
- Bottom Bracket Type BB86 Press-Fit (86.5mm width, 41mm bore)
- Frame Material C:62 Carbon
- Hub Spacing Non-Boost 130mm–142mm
Compatibility Verdict: ⚠️ Advanced. You must use the 100mm axle motor variant, CNC High-Precision Reducer Support Bushings, the 1mm / 2mm Precision Spacer Kit, and protective interface pads. DM01 strictly prohibited. DM02 only, 35–40Nm lockring limit.
Axial GTC Pro / GTC SL / GTC SLX (Carbon)
- Bottom Bracket Type BB86 Press-Fit (86.5mm width, 41mm bore)
- Frame Material Carbon
- Hub Spacing Non-Boost 130mm
Compatibility Verdict: ⚠️ Advanced. The GTC designation marks Cube’s carbon composite construction across the Axial line. All GTC variants use BB86 press-fit. You must use the 100mm axle, CNC bushings, precision spacer kit, and interface pads. DM01 strictly prohibited. DM02 only.
Note: The entry-level Axial WS aluminum uses BSA 68mm threaded and is drop-in compatible. Do not confuse the aluminum Axial WS with the carbon GTC variants when ordering hardware.
Litening C:68X (Air / Pro / Race Variants)
- Bottom Bracket Type BB86 Press-Fit (86.5mm width, 41mm bore)
- Frame Material C:68X Carbon
- Hub Spacing Non-Boost 130mm
- Internal Routing Fully internal.
Compatibility Verdict: ⚠️ Advanced. You must use the 100mm axle motor variant, CNC High-Precision Reducer Support Bushings, the 1mm / 2mm Precision Spacer Kit, and protective interface pads. DM01 is strictly prohibited. DM02 only, 35–40Nm lockring limit.
Litening Aero C:68X
Compatibility Verdict: ❌ Not Recommended. The Litening Aero uses deep aerodynamic tube profiles that provide insufficient physical clearance for the motor housing to be seated correctly against the downtube. The Aero additionally routes brake hoses fully internally through the headset with cable exit ports positioned such that cables cannot be rerouted cleanly around the motor block. Do not attempt electrification on this platform.
Aerium C:68 / Aerium TT
Compatibility Verdict: ❌ Not Recommended. Cube’s dedicated triathlon and time trial platforms use extreme aerodynamic tube profiling that makes correct motor positioning physically impossible. Do not attempt conversion on either Aerium variant.
Category 4: Gravel Bikes
Cross Race (Aluminum)
- Bottom Bracket Type BSA 68mm Threaded
- Frame Material Aluminum
- Hub Spacing Non-Boost 142mm
Compatibility Verdict: ✅ Easy. BSA 68mm threaded shell. The 68mm Toseven motor drops in with no adapter hardware. Both DM01 and DM02 are compatible.
Nuroad (Aluminum, All Variants — Race, Pro, FE)
- Bottom Bracket Type BB86 Press-Fit (86.5mm width, 41mm bore)
- Frame Material Aluminum
- Hub Spacing Non-Boost 142mm
Compatibility Verdict: ⚠️ Moderate. Despite being an aluminum frame, every variant of the Nuroad aluminum uses a press-fit BB86 shell — the same standard as Cube’s carbon road platforms. You must order the 100mm axle motor variant, use CNC High-Precision Reducer Support Bushings, and use the 1mm / 2mm Precision Spacer Kit. Both DM01 and DM02 are compatible on this aluminum frame.
Critical Warning: This is the single most commonly misidentified platform in the Cube lineup. Riders assume the aluminum Nuroad is BSA threaded and order the 73mm motor. Remove the existing bottom bracket and physically inspect the shell before ordering. A smooth bore means press-fit. Visible threads mean BSA.
Cross Race C:62 / C:68X (Carbon)
- Bottom Bracket Type BB86 Press-Fit (86.5mm width, 41mm bore)
- Frame Material C:62 or C:68X Carbon
- Hub Spacing Non-Boost 142mm
Compatibility Verdict: ⚠️ Advanced. 100mm axle, CNC bushings, precision spacer kit, and interface pads mandatory. DM01 strictly prohibited. DM02 only, 35–40Nm lockring limit.
Nuroad C:62 (Carbon)
- Bottom Bracket Type BB86 Press-Fit (86.5mm width, 41mm bore)
- Frame Material C:62 Carbon
- Hub Spacing Non-Boost 142mm
Compatibility Verdict: ⚠️ Advanced. Identical hardware requirements to the carbon Cross Race. 100mm axle, CNC bushings, spacer kit, and interface pads mandatory. DM01 strictly prohibited. DM02 only, 35–40Nm lockring limit.
Category 5: Trekking Bikes
Kathmandu / Pro / SLX
- Bottom Bracket Type BSA 68mm Threaded
- Frame Material Aluminum
- Hub Spacing Non-Boost 130mm or 135mm depending on variant
- Internal Routing Semi-internal to external depending on trim level
Compatibility Verdict: ✅ Easy. BSA 68mm threaded shell. The 68mm Toseven motor drops in with no adapter hardware required. These are among the most practical conversion candidates in the Cube lineup — upright geometry, long wheelbase, and a spacious main triangle make battery placement straightforward.
Recommendation: The DM02 is the definitive choice for all Kathmandu variants. The DM01’s 160Nm output exceeds what trekking-grade chains, cassettes, and derailleurs are rated to handle over sustained long-term use. The DM02’s 90Nm is more than sufficient for fully loaded touring, commuting, and urban riding.
Touring / Touring Pro
- Bottom Bracket Type BSA 68mm Threaded
- Frame Material Aluminum
- Hub Spacing Non-Boost 130mm
Compatibility Verdict: ✅ Easy. BSA 68mm threaded shell. Drop-in compatible. DM02 strongly recommended for the same drivetrain longevity reasons as the Kathmandu.
Hyde / Hyde Race
- Bottom Bracket Type BSA 68mm Threaded
- Frame Material Aluminum
- Hub Spacing Non-Boost 135mm
Compatibility Verdict: ✅ Easy. BSA 68mm threaded shell. Drop-in compatible. DM02 strongly recommended.
Category 6: City and Urban Bikes
Nature / Nature Pro / Allroad / ONE
- Bottom Bracket Type BSA 68mm Threaded
- Frame Material Aluminum
- Hub Spacing Non-Boost 130mm
Compatibility Verdict: ✅ Easy. BSA 68mm threaded shell. The 68mm Toseven motor drops in with no adapter hardware. The Nature lineup is one of the most natural conversion platforms in the Cube catalogue — wide tires, low stand-over, integrated carrier mounts, and an upright geometry all suit electrified urban riding perfectly. DM02 is the definitive recommendation.
Town / Town Pro
- Bottom Bracket Type BSA 68mm Threaded
- Frame Material Aluminum
- Hub Spacing Non-Boost 130mm
Compatibility Verdict: ✅ Easy. BSA 68mm threaded shell. Drop-in compatible. DM02 strongly recommended for urban daily use.
02 Understanding Your Cube’s Bottom Bracket
Welcome to the mechanical core of your Cube bicycle. The bottom bracket is the single most critical factor in determining whether your Toseven conversion succeeds or fails. Cube manufactures some of the most precisely engineered bicycles in the European market — but to achieve this level of refinement, they deploy a diverse set of bottom bracket standards across their lineup. You cannot buy a Toseven motor, slide it into any Cube frame, and expect it to work. Understanding your frame’s mechanical interface is non-negotiable.
1 What is a Bottom Bracket?
The bottom bracket (BB) is the hollow, cylindrical tube at the very lowest point of your bicycle frame. It is the structural junction where the downtube, seat tube, and chainstays all converge. On a standard Cube bicycle, this tube houses bearings that allow your crankset to spin. In a Toseven mid-drive conversion, the entire original crankset — pedal arms, spindle, and bearings — is removed completely. The Toseven DM01 or DM02 motor axle slides directly through this empty tube, and a large steel lockring is threaded onto the axle on the non-drive side, clamping the motor body tightly against the frame. The bottom bracket is no longer a bearing housing. It becomes the primary structural anchor for a motor generating up to 160Nm of rotational force. If the motor does not fit this tube correctly, the installation will fail catastrophically.
2 Threaded vs. Press-Fit: The Mechanical Reality
The Threaded Bottom Bracket (BSA)
- The Design The inside of the frame’s BB shell features spiral threads machined directly into the metal.
- The Fit The internal diameter is approximately 33.6mm to 33.9mm.
- The Toseven Advantage The Toseven motor axle is manufactured to exactly 33.5mm — natively designed to slide through a BSA shell with virtually zero radial play.
- Clamping Load The clamping hardware locks directly against the flat threaded faces of the shell. This is the safest and most mechanically sound conversion interface possible.
The Press-Fit Bottom Bracket (BB86 / BB92)
- The Design A Press-Fit shell has no threads. The inside is a perfectly smooth bore.
- The Fit Cube’s standard press-fit shells have an internal diameter of exactly 41mm.
- The Engineering Problem If you slide a 33.5mm Toseven motor axle into a 41mm press-fit bore, the motor floats loosely inside the frame. The immense twisting force of the motor would cause it to violently pivot inside the bore, permanently destroying the shell.
- The Solution To safely bridge this 7.5mm gap safely, you must use CNC High-Precision Reducer Support Bushings — machined metal sleeves that press tightly into the 41mm bore, stepping it down to exactly 33.5mm.
- Axle Length Requirements BB86 shells are 86.5mm wide. BB92 shells are 92mm wide. A standard 68mm or 73mm motor axle disappears entirely inside either shell with no thread protrusion for the lockring. You must use the 100mm axle motor variant for all press-fit Cube frames.
3 Cube Bottom Bracket Standards — Critical Breakdown
Cube does not use a single press-fit or threaded shell across their lineup. The width of the shell determines exactly which Toseven motor variant you must purchase.
- Internal Diameter ~33.7mm (Threaded)
- Shell Width 68mm
- Found On Attain (Alum), Agree (Alum), Axial WS (Alum), Cross Race (Alum), Kathmandu (all), Touring, Hyde, Nature, Town, and all trekking and city platforms.
The Engineering Verdict: The standard 68mm Toseven motor drops in directly. No adapter hardware is required.
- Internal Diameter ~33.7mm (Threaded)
- Shell Width 73mm
- Found On Reaction (Alum), Aim, Sting, AMS, Access WS, Analog, Reaction C:62, Stereo 140/150/160/180 (Alum), Stereo 120 HPA (pre-2018), ONE44/ONE55/ONE77 (carbon).
The Engineering Verdict: The standard 73mm Toseven motor drops in directly. No adapter hardware is required on aluminum frames. Carbon frames require the DM02 and carbon protocol.
- Internal Diameter 41mm (Smooth, threadless bore)
- Shell Width 86.5mm
- Found On Litening C:68X, Attain C:62/GTC, Agree C:62, Axial GTC, Nuroad C:62, Cross Race C:62/C:68X, and — critically — the Nuroad aluminum.
The Engineering Verdict: A standard 73mm axle motor is too short. You must order the 100mm axle variant. You must install CNC High-Precision Reducer Support Bushings. You must use the 1mm / 2mm Precision Spacer Kit to center the motor within the 86.5mm shell.
- Internal Diameter 41mm (Smooth, threadless bore)
- Shell Width 92mm
- Found On Elite C:68X (carbon hardtail), Stereo 120 HPA (2018+), Stereo ONE22 HPA.
The Engineering Verdict: Identical bore to BB86 — the same CNC bushings fit both. However, the 92mm shell width leaves approximately 8mm of dead axle space when the 100mm axle is installed. The 1mm / 2mm Precision Spacer Kit is mandatory to fill this gap and prevent axle bottoming out.
- Internal Diameter Smooth bore, non-standard
- Shell Width 107mm
- Found On TWO15 (downhill only)
The Engineering Verdict: No Toseven axle variant reaches 107mm. Conversion is not possible on this platform.
4 The Precision Centering Rule (Mandatory Enforcement)
When installing a 100mm Toseven axle into an 86.5mm (BB86) or 92mm (BB92) Cube frame, you will have leftover exposed axle space that must be filled precisely. You must adhere strictly to the Precision Centering Rule: the motor must be perfectly centered in the frame, and the 1mm / 2mm Precision Spacer Kit must be used to fill any mechanical gaps on the axle. This is non-negotiable for three reasons:
- Preventing Axle Bottoming Out Without spacers, the lockring runs out of threads and hits the unthreaded shoulder of the axle before it ever contacts the frame face. The nut feels tight at the wrench but the motor is mechanically loose. Under motor torque, the loose motor pivots and tears the shell apart.
- Preventing Uneven Load Distribution On carbon Cube frames, asymmetrical clamping pressure from a non-centered motor fractures the carbon fiber resin matrix even at reduced torque settings.
- Preventing Chainline Bias A motor shifted too far toward the drive side pushes the chainring outboard, causing chain drops in climbing gears. Too far toward the non-drive side, the motor casing contacts the frame tubes and the chainline shifts inboard. Correct spacer distribution centers the motor and establishes a clean, drop-free chainline.
5 The Carbon Frame Protocol
Cube’s C:62 and C:68X carbon fiber is engineered to resist tensile pulling forces generated by pedaling. It is not engineered to withstand localized compressive crushing forces. The DM01 generates 160Nm of torque. The metal mounting plate acts as a lever against the frame. This lever transfers the motor’s rotational force as a crushing compressive load against the carbon walls of the BB shell. The result is carbon fiber delamination, resin matrix fracture, and permanent frame destruction. There are no exceptions and no torque settings at which the DM01 becomes safe on a carbon Cube frame. The DM02’s 90Nm output, combined with the strict 35 to 40Nm lockring limit and protective interface pads, distributes the compressive load within the structural limits of Cube’s carbon layup.
03 Mistakes That Can Destroy Your Build
As a professional drivetrain specialist, these are the exact failures I see on Cube conversions repeatedly. Do not let your build fall victim to them.
- Ordering the Wrong Axle Length for a Press-Fit Shell The Elite C:68X, Stereo 120 HPA (2018+), ONE22 HPA, Nuroad aluminum, and every carbon road and gravel platform use shells that are 86.5mm to 92mm wide. A 73mm axle disappears inside the frame entirely — there is zero thread exposure for the lockring. Measure your shell width face-to-face with a caliper before ordering anything.
- Assuming the Nuroad Aluminum Is BSA Threaded Every other aluminum Cube platform in this guide uses BSA threaded. The Nuroad aluminum is the single exception — it uses a press-fit BB86 despite being an aluminum frame. This is the most consequential ordering mistake in the Cube lineup. Remove the existing bottom bracket and physically inspect the shell before ordering. A smooth bore means press-fit. Visible threads mean BSA.
- Assuming the Stereo 120 HPA Is Always BSA Threaded The Stereo 120 HPA used a BSA 73mm threaded shell before 2018 and switched to BB92 press-fit from 2018 onwards. These two frames require completely different hardware. You must verify your model year and physically inspect the shell before ordering.
- Installing the DM01 on Any Carbon Cube Frame It does not matter what the frame costs, what model year it is, or what trim level it carries. The DM01 is strictly prohibited on every C:62 and C:68X Cube frame without exception. The frame will be permanently destroyed. There is no recovery and no repair for crushed carbon fiber at the BB shell.
- Using Cheap Third-Party Bushings on Press-Fit Frames Plastic, nylon, or 3D-printed press-in adapters appear to fit and feel stable at installation. Under 90Nm of DM02 torque on the first real climb, they crush instantly. The steel motor axle then contacts the bare carbon or aluminum bore and gouges the shell permanently beyond repair. You must use official CNC-machined metal High-Precision Reducer Support Bushings on every press-fit Cube frame in this guide.
- Skipping the Spacer Kit on 100mm Axle Builds Even with correct bushings and the correct 100mm axle, discarding the 1mm / 2mm Precision Spacer Kit will result in axle bottoming out. The lockring feels tight at the wrench but the motor is mechanically loose. Under motor torque, the loose motor pivots and tears the CNC bushings clean out of the shell in a single hard acceleration event.
- Skipping the Suspension Clearance Test on Full-Suspension Platforms Cube’s lower suspension linkage sweeps directly through the motor housing space as the shock compresses. Skipping the clearance test means the first hard trail impact drives the linkage into the motor housing at speed. The result is a shattered motor casing or torn suspension pivot — both failures that are serious crash risks.
- Ignoring Internal Cable Routing on Cube Frames Cube’s integrated internal cable routing exits near the BB shell on virtually all modern platforms. Clamping the motor body against cables trapped between the motor and the frame causes brake failure, jammed shifting, and false torque sensor readings that generate erratic uncontrollable power delivery. Always route cables around the motor block with protective conduit before tightening any hardware.
- Attempting to Convert the TWO15 or Either Aerium Platform The TWO15 uses a 107mm DH-specific press-fit shell for which no Toseven axle variant exists. The Aerium platforms use extreme aerodynamic tube profiles that physically prevent correct motor positioning. Do not attempt electrification on any of these three platforms under any circumstances.
04 FAQ & Troubleshooting
1 My Cube is aluminum. Does that guarantee it’s BSA threaded?
Almost — but not entirely. Every aluminum Cube hardtail, trekking, touring, city, and longer-travel full-suspension platform in this guide uses BSA threaded. There are two exceptions: the Nuroad aluminum, which uses a press-fit BB86 despite being an aluminum frame, and the Stereo 120 HPA from 2018 onwards, which switched from BSA 73mm to BB92 press-fit mid-production. If you own either of these, you must follow the press-fit protocol: 100mm axle, CNC reducer bushings, and precision spacer kit. For every other aluminum Cube in this guide, BSA is confirmed and the motor drops in with no adapter hardware.
2 Can I install the DM01 on my Cube Reaction C:62 carbon hardtail?
No. The DM01 is strictly prohibited on every carbon Cube frame regardless of BB standard, model year, or riding intensity. The Reaction C:62 uses a BSA 73mm threaded shell — so no reducer bushings are required — but the frame material is C:62 carbon, and the DM01’s 160Nm output will crush the carbon walls of the BB shell under hard acceleration. You must use the DM02, limit the primary lockring to 35–40Nm, and install protective interface pads between the motor housing and the carbon downtube. No exceptions apply.
3 My Cube Stereo 120 HPA is a 2019 model. What exactly do I need to order?
Three things. First, the 100mm axle motor variant — a 2019 Stereo 120 HPA uses BB92 press-fit, meaning the shell is 92mm wide and a standard 73mm axle disappears inside the frame with no thread exposure. Second, CNC High-Precision Reducer Support Bushings to bridge the 7.5mm gap between the 41mm bore and the 33.5mm motor axle. Third, the 1mm / 2mm Precision Spacer Kit to fill the approximately 8mm of dead axle space and prevent axle bottoming out. Both DM01 and DM02 are compatible on this aluminum frame. The suspension clearance test is also mandatory before tightening any mounting hardware.
4 I own a Cube Nuroad aluminum. Why does it need the same hardware as a carbon road bike?
Because it uses the same bottom bracket standard. Despite being an aluminum frame, Cube designed the Nuroad aluminum with a press-fit BB86 shell — 86.5mm wide, 41mm smooth bore — specifically to allow the wide chainstay spacing needed for 45mm tires. The frame material is irrelevant to the hardware requirements. The shell width and bore diameter are what dictate which motor variant and adapters you need. The aluminum construction does mean both DM01 and DM02 are compatible — but the press-fit hardware requirements are identical to the carbon road platforms.
5 What is the difference between converting a Stereo ONE44 C:62 and a Stereo 140 aluminum?
The BB standard is identical on both — BSA 73mm threaded — so no reducer bushings are required on either platform. The critical difference is frame material. The Stereo 140 aluminum accepts both DM01 and DM02 with standard lockring torque. The Stereo ONE44 C:62 is carbon, which means the DM01 is strictly prohibited, the primary lockring is limited to 35–40Nm, and protective interface pads are mandatory. Both platforms require the suspension clearance test before finalizing installation. The carbon construction is the only factor that changes the motor selection, torque protocol, and pad requirement.
6 I have a Cube Elite C:68X. What do I need and why is it so complicated?
The Elite C:68X sits at the most demanding intersection in this guide — it is simultaneously a carbon frame and a press-fit BB92 frame, combining both complications at once. You need: the 100mm axle motor variant (the BB92 shell is 92mm wide — a 73mm axle cannot be installed), CNC High-Precision Reducer Support Bushings (the 41mm bore must be stepped down to 33.5mm), the 1mm / 2mm Precision Spacer Kit (to fill dead axle space and prevent bottoming out), and protective interface pads (C:68X carbon must not be exposed to unpadded clamping loads). The DM01 is strictly prohibited. DM02 only, 35–40Nm lockring limit, no exceptions.
7 Which motor should I choose for my Cube Kathmandu, Nature, or Town?
The DM02 without question. All three are platforms designed for sustained, comfortable, loaded riding — not peak torque output. The DM01’s 160Nm will accelerate wear on the trekking-grade chain, cassette, and rear derailleur faster than these components are rated to handle over long-term use. The DM02’s 90Nm output is more than sufficient for fully loaded touring, daily commuting, and urban riding. The DM02 also pairs naturally with the deliberate riding pace of these platforms — briefly pausing pedal input during gear changes is easy to adopt and keeps the drivetrain in excellent condition indefinitely.
8 Can I convert a Cube Litening Aero, Aerium, or TWO15?
No, on all three. The Litening Aero and both Aerium platforms use deep aerodynamic tube profiles that leave insufficient physical clearance for the motor housing to be seated correctly against the downtube. The Litening Aero additionally routes brake hoses fully internally through the headset, with exit ports positioned directly in the path the motor must occupy — making clean cable routing around the motor block impossible. The TWO15 is a fundamentally different problem: it uses a 107mm DH-specific press-fit shell for which no Toseven axle variant exists. Do not attempt electrification on any of these three platforms.
9 My motor feels jerky or cuts out erratically after installing on my Cube. What is wrong?
On Cube platforms specifically, the most common cause is cable interference with the torque sensor. Cube’s internal cable routing exits near the BB shell on virtually all modern platforms. If the motor is rotated upward against the downtube and the derailleur cable or brake hose is pinched tightly against the motor casing, the physical tension of those cables pressing against the motor mimics pedal pressure on the torque sensor. The sensor interprets this as active rider input and delivers erratic, uneven power. The fix is to wrap all cable exits in protective conduit and re-route the cables cleanly around the motor block, ensuring zero contact between any cable and the motor housing before re-tightening the locknuts. The second most common cause is violating the 3-second calibration rule at power-on — if foot pressure was applied to the pedals within 3 seconds of the T24 display powering on, the sensor has a corrupted zero-point baseline. Power the system off completely, wait 10 seconds, power back on, and keep all weight off the pedals for a full 3-second count before riding.
10 Do I need to run the suspension clearance test every time I remove and reinstall the motor?
Yes. Any time the motor is removed from a full-suspension Cube and reinstalled — even if the bike itself has not changed — the clearance test must be repeated. Any change in the motor’s rotational position against the downtube, even a few degrees, alters the geometry of the gap between the motor casing and the lower linkage. The test takes less than two minutes and eliminates a catastrophic failure mode. It is always worth the time.
