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- dafuli01@ebikeserviceparts.com
Bafang ISIS crank arm set,170mm heavy‑duty FAT forged aluminum with ISIS‑10 spline. Replacement spare cranks for Bafang M620 G510 G530 M820 high‑torque mid‑drive ebike motors.
This heavy‑duty 170mm FAT forged‑aluminum Bafang ISIS crank arm set is dedicated replacement spare parts for Bafang high‑torque mid‑drive motors. Adopts standard ISIS‑10 spline interface, the thickened FAT crank body can withstand high torque output of M620/G510/G530/M820 motors, perfect for replacing bent, worn or cracked original crank arms.
✅ Bafang Mid‑Drive Motors：M620, G510, G530, M820
Note: Only fits motors with ISIS‑10‑spline interface. Not compatible with Shimano Octalink (8‑tooth spline) or JIS square spindle.
| Parameter | Value |
|---|---|
| Crank Length | 170mm |
| Interface Standard | ISIS‑10 Spline |
| Material | Forged Aluminum Alloy |
| Design | Heavy‑Duty FAT Thickened Crank |
1 pair × 170mm FAT Bafang ISIS Crank Arms (Left Crank + Right Crank)
✅ Heavy‑Duty FAT Thickened Structure：Reinforced thick crank body, specially built for high‑torque Bafang M620/G510/G530/M820 mid‑drive motors, anti‑bending under heavy‑load climbing.
✅ Precision ISIS‑10‑Spline Dimensions：Manufactured to OEM spline specification, ensures tight fitting connection and prevents crank slipping under high‑torque pedaling.
✅ Forged Aluminum Alloy Construction：Superior rigidity and impact‑resistance compared with cast cranks, extends service life for high‑power fat‑tire and cargo ebikes.
✅ 170mm Universal Crank Length：Ergonomic 170 mm crank length, great for mountain ebikes, fat‑tire ebikes and heavy‑duty cargo e‑bikes.
✅ Direct Drop‑in Replacement Spare Part：Direct swap for original cranks during ebike maintenance and motor rebuild.
Please verify your motor model and confirm it uses ISIS‑10‑spline interface before placing your order to prevent incompatibility. Not compatible with square‑taper or Octalink motors.
Minor color differences may appear due to lighting conditions and screen display variations.
Allow mechanical measurement tolerance.
Only crank arms are included; pedals, chainring, crank bolts and mounting 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 heavy‑duty crank replacement to restore original pedaling performance for high‑power Bafang mid‑drive ebikes.
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.
