
ZSM3185E
3 Gear Auto-shifting Motor ZSM3185E
250/350/500W 3-speed new-platform, 2-stage reduction, only 3.1 kg. EU premium city bikes and folding e-bikes.

ZSM3185E
3 Gear Auto-shifting Motor ZSM3185E
250/350/500W 3-speed new-platform, 2-stage reduction, only 3.1 kg. EU premium city bikes and folding e-bikes.
3 Gear Auto-shifting Motor 12 Specs6 Highlights

Transmission Detail
A close-up motion layer reinforces precision and engineering character instead of showing specs alone.
Specifications
| O.L.D | 142mm |
| Weight | 3.1kg |
| Wire Exit | Left or Right Axle End |
| Brake Type | Disc Brake |
| Dimensions | φ158×202mm |
| Drive Type | Chain / Belt Drive |
| Step Ratios | 0.74 / 1 / 1.36 |
| Shifting Mode | Automatic |
| Max Motor Torque | 45/50/65Nm |
| Number of Speeds | 3-speed |
| Total Gear Ratio | 1.85 |
| Rated Motor Power | 250W / 350W / 500W |
Highlights
- New dual-stage platform, only 3.1kg
- Higher torque for powerful starts
- 3-speed covers all riding conditions
- Axle-side routing, maintenance-free
- 40%+ range improvement
- Chain, belt and shaft drive compatible
Products
Overview
ZSM3185E brings next-generation 2-stage reduction technology into a light 3.1 kg package with 50/55Nm torque. The compact dimensions make it ideal for EU premium urban e-bikes and folding e-bikes where weight and aesthetics are priorities.
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