- No. 43, Yushan Road, Huqiu District, Suzhou City, Jiangsu Province, China
- +8613671928471
- dafuli01@ebikeserviceparts.com
Full mounting hardware kit for Bafang M820 mid-drive motor. Includes crank fixing bolts, lock retainer ring, M3*8 screws, M8 mounting screw and chainring nut. Replacement fasteners for crank & chainring assembly.
This complete mounting accessory kit is specially designed for the Bafang M820 mid drive electric bicycle motor. It contains all required fasteners for crank arm installation and chainring mounting, ideal for original replacement, motor overhaul and e-bike conversion repair.
| Item | Parameter |
|---|---|
| Compatible Motor | Bafang M820 Mid Drive Motor |
| Kit Contents | Crank fixing bolts, lock retainer ring, M3*8 small screws, M8 mounting screw, chainring nut |
| Crank Bolt Length | 72mm, head diameter 9.9mm |
| Lock Retainer Ring | OD 43mm, ID 31.2mm, width 35.4mm |
| Small Screws | M3*8 |
| Chainring Fastener | M8 mounting screw + matching chainring nut |
| Material | High strength carbon steel |
| Surface Finish | Black anti-rust coating |
| Application | Bafang M820 crank arm locking & chainring fixed assembly |
✅ Dual-Purpose Fastener Set: Covers both crank arm locking and chainring mounting for Bafang M820 mid motor, one kit meets full installation needs.
✅ Anti-loose Lock Retainer Ring: Slotted locking ring prevents crank arm slipping and loosening under high torque during acceleration.
✅ Precision Machined: Strict dimension control, perfectly matches the original mounting holes of Bafang M820 mid motor.
✅ High Strength & Anti-corrosion: Black coated steel hardware withstands heavy torque load and outdoor wet cycling environments.
✅ Direct Replacement Spares: Perfect replacement for lost, rusted or stripped original bolts and nuts during motor maintenance.
Must-have spare parts for ebike repair shops, B2B distributors and Bafang M820 mid motor conversion & maintenance.
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.
