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18‑45 teeth double‑layer helical nylon gear for ANANDA M131 e‑bike front & rear drive hub motor. 47.4mm OD, total height 20mm, high wear‑resistant plastic, direct‑fit replacement spare gear for hub motor repair.
This professional double‑layer helical nylon planetary gear is dedicated replacement spare part engineered for ANANDA M131 electric bike hub motors, compatible with both front‑drive and rear‑drive versions. Adopts 18‑tooth inner + 45‑tooth outer helical gear construction, precisely matched to original motor dimension to restore stable power transmission and quiet riding performance.
✅ ANANDA M131 Front‑Drive Hub Motor
✅ ANANDA M131 Rear‑Drive Hub Motor
| Parameter | Value |
|---|---|
| Gear Structure | Double‑layer helical planetary gear |
| Teeth Count | 18 Teeth (inner) + 45 Teeth (outer) |
| Large Gear Outer Diameter(D2) | 47.4mm |
| Small Gear Diameter(D1) | 25.8mm |
| Large Gear Height(d2) | 9.2mm |
| Small Gear Height(d1) | 13.2mm |
| Overall Height | 20mm |
| Gear Type | Helical Gear |
3 × Double‑Layer Helical Nylon Planetary Gears (18T+45T)
✅ Precise OEM Dimensions: Strictly manufactured to original specification, 47.4mm outer diameter, total height 20mm, perfect fit for ANANDA M131 front‑rear hub motor.
✅ 18T+45T Double‑Layer Helical Gear Design: Helical tooth structure brings smoother rotation, lower running noise and optimized torque transfer for daily city commuting.
✅ High‑Strength Wear‑Resistant Nylon Plastic: Premium nylon material delivers outstanding wear‑resistance and shock‑absorbing performance, effectively extend service life of M131 hub motor under continuous load.
✅ Direct Replacement: No modification needed for installation, ideal spare component to fix worn‑out, cracked or broken original planetary gear.
✅ Fits Both Front‑Drive & Rear‑Drive: Works for front drive and rear drive variant of ANANDA M131 ebike hub motor.
Brand: Compatible for ANANDA
Product Name: Double‑Layer Helical Planetary Nylon Gear
Material: High‑strength Nylon Plastic
Gear Teeth: 18 Teeth (inner) + 45 Teeth (outer) Large Gear
Outer Diameter: 47.4mm
Small Gear Diameter: 25.8mm
Small Gear Height:13.2mm
Large Gear Height:9.2mm
Overall Gear Height:20mm
Compatible Motors: ANANDA M131 Front‑Drive & Rear‑Drive E‑bike Hub Motor
Color: As shown in picture
Package: 3 pcs × Nylon Planetary Gears
Please double‑confirm your motor model is ANANDA M131 before placing order to avoid incompatibility. Gear fit depends purely on motor model, rated voltage will not affect gear compatibility.
Minor color differences may exist due to lighting and screen display variations.
Allow measurement tolerance of ±1‑3mm.
Only nylon gears are included; other motor assembly parts shown in reference images are not covered.
Excellent replacement spare parts for ebike repair shops, DIY motor rebuilders and ebike wholesale distributors. Cost‑effective gear kit to solve ANANDA M131 hub motor gear damage and noise issues, restore motor original performance.
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.
