- No. 43, Yushan Road, Huqiu District, Suzhou City, Jiangsu Province, China
- +8613671928471
- dafuli01@ebikeserviceparts.com
Bafang BBS-HD main square spindle, BB 68mm /100mm /120mm optional. Crank connecting main shaft only for BBSHD mid drive motor. Important: NOT compatible with BBS01 / BBS02 motors to avoid wrong order.
This Bafang BBS-HD main square spindle is the original-style crank connecting main shaft for Bafang BBSHD high torque mid drive ebike motors. It transfers pedaling torque to the motor and connects to square taper crank arms. Multiple BB size options available to match different bike bottom bracket shells.
✅ Bafang Mid-Drive Motor：BBSHD (BBS-HD)
Important Note: This main shaft is ONLY for BBSHD. It CANNOT fit BBS01 or BBS02 mid drive motors. Please carefully distinguish models to prevent wrong purchase and installation failure.
| Parameter | Value |
|---|---|
| Type | Square Taper Main Spindle |
| BB 68mm | Total Length 174mm |
| BB 100mm | Total Length 191mm |
| BB 120mm | Total Length 211mm |
| Application | Crank connecting main shaft for BBSHD mid motor |
1 × Bafang BBS-HD Main Shaft (Select your BB size: BB68 / BB100 / BB120)
✅ Multiple BB Size Options：3 versions available for BB68mm, BB100mm, BB120mm bottom bracket shells to match different frame installation requirements.
✅ Precision Machined Square Taper End：Accurate square taper interface to firmly lock square crank arms, stable torque transmission, no crank slipping.
✅ Heavy Duty Shaft Construction：High strength steel main shaft, designed for high torque output of BBSHD motor, durable for heavy load and hill climbing riding.
✅ Direct Replacement Spare Part：Perfect replacement for worn, bent or damaged original BBSHD main shaft during motor overhaul and maintenance.
✅ Model Distinction Reminder：Specially engineered for BBSHD only, different dimension and structure compared with BBS01/BBS02 main shaft, cannot be interchanged.
This main shaft is exclusive to Bafang BBSHD motor. It will NOT work for BBS01 or BBS02. Please confirm your motor model and frame BB shell size before ordering to avoid mistake.
You must select the correct BB size (68mm /100mm /120mm) when placing order.
Minor color differences may appear due to lighting conditions and screen display variations.
Allow mechanical measurement tolerance.
Only main shaft is included; bearings, gears, crank arms and other motor accessories shown in reference images are not part of the package.
Perfect spare parts for e‑bike repair stores, DIY motor rebuilders and ebike wholesale distributors. Cost‑effective BBSHD motor repair part to restore power transmission.
We specialize in mid-drive motors and e-bike parts. Strict testing, powerful R&D and flexible OEM service guarantee long-term cooperation.
It used to take me weeks to hunt down hard‑to‑find e‑bike spare parts. Their compatibility‑check technical support saved me countless repair headaches. Reliable supplier I can always count on.
For more FAQs and further details, please get in touch with us
We supply genuine OEM parts and premium compatible aftermarket replacement parts for e-bikes, including motor components, controllers, throttles, PAS sensors, wiring harnesses, connectors and Bosch form-factor batteries.
We serve mainstream drive system manufacturers: Ananda, Bafang, Aikema, Tongsheng, Shengyi, Bosch and more. We also provide repair components for complete e-bike brands including Sur‑Ron, Aventon, Trek and many others.
All items are brand-new and inspected before shipment. We do not supply second-hand or refurbished goods.
Our team verifies compatibility according to your bike model, motor info or original part photos. We confirm available OEM parts or recommend workable alternative solutions.
Yes. Flexible order sizes are supported, ranging from single spare parts to bulk purchases.
Sea freight, air freight and rail transport are optional.
Lead time varies by item and shipping mode. We confirm exact timelines before each order and share tracking updates.
We provide part identification, model matching and full order follow-up support.
