ZSM3185K
3 Gear Auto-shifting Motor ZSM3185K
250/350W 3-speed inner-rotor ultra-light mid-drive, only 2.7 kg, φ121mm. For shared bikes, commuters and front-drive e-bikes.
ZSM3185K
3 Gear Auto-shifting Motor ZSM3185K
250/350W 3-speed inner-rotor ultra-light mid-drive, only 2.7 kg, φ121mm. For shared bikes, commuters and front-drive 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 | 2.7kg |
| Wire Exit | Left axle end |
| Brake Type | Disc |
| Dimensions | φ121×199mm |
| Drive Type | Chain / Belt Drive |
| Step Ratios | 0.74 / 1 / 1.36 |
| Shifting Mode | Automatic |
| Max Motor Torque | 45 / 50Nm |
| Number of Speeds | 3-speed |
| Total Gear Ratio | 1.85 |
| Rated Motor Power | 250W / 350W |
Highlights
- Inner rotor design, ultralight at 2.7kg
- Designed for premium city and folding bikes
- 3-speed with ultra-quiet operation
- 40%+ range improvement
- Axle-side routing, maintenance-free
- Chain and belt drive compatible
Products
Overview
ZSM3185K is the lightest model in the 3185 series. Inner-rotor architecture with 2-stage reduction achieves a remarkable φ121mm diameter and 2.7 kg weight — perfect for weight-sensitive applications: shared bikes, commuters and front-drive e-bike platforms.
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