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Bafang RM G120.250.DC nylon compound gear, 26T+40T dual gear with built-in 688Z bearing, single gear weight 27g. Replacement spare gear exclusively for Bafang G120 250W rear hub ebike motor.
This Bafang G120 nylon compound gear is a dedicated replacement spare part for Bafang RM G120.250.DC 250W rear hub ebike motors. It adopts integrated dual gear structure with 26T small gear and 40T large gear, pre-installed with 688Z bearing for smooth rotation. Made of high-performance nylon material to reduce noise and resist abrasion.
✅ Bafang Hub Motor：RM G120.250.DC 250W Rear Hub Motor
Important Note: This nylon gear is ONLY compatible with Bafang RM G120.250.DC 250W hub motor. Not suitable for other Bafang hub motors or mid-drive motors. Please confirm your motor model before ordering.
| Parameter | Value |
|---|---|
| Gear Type | Compound Dual Gear: 26T + 40T |
| Bearing Model | 688Z Bearing (Pre-installed) |
| Outer Diameter | 42mm |
| Inner Gear Diameter | 28mm |
| Thickness | 18.6mm |
| Single Gear Net Weight | 27gc×3 |
| Material | Wear-resistant Nylon |
3 × Bafang RM G120.250.DC Nylon Compound Gear
✅ Integrated 26T+40T Compound Gear Design: Combined large and small gear structure, accurate tooth profile ensures stable power transmission and smooth gear meshing.
✅ Pre-installed 688Z Bearing: Comes with 688Z bearing pre-pressed inside, reduces friction, quieter operation and easy direct installation.
✅ High Quality Nylon Material: Good toughness, impact resistance and low noise, effectively reduce gear wear during long-time motor operation.
✅ Exact OEM Replacement: Precision machined tooth profile, perfect fit for Bafang RM G120.250.DC 250W hub motor, ideal for replacing worn, cracked or broken original gears.
✅ Lightweight Construction: Only 27g per piece, no extra load on the hub motor while maintaining structural strength.
This gear only fits Bafang RM G120.250.DC 250W rear hub motor. It will not work on other Bafang motor models. Please verify your motor model before placing your order to avoid wrong purchase.
Minor color differences may appear due to lighting conditions and screen display variations.
Allow mechanical measurement tolerance.
Only nylon compound gear with bearing is included; motor housing, stator, axle and other motor components 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 gear replacement to restore quiet and stable operation for Bafang G120 250W hub motors.
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.
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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.
