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E-CITY
CZJB-90HZ e-bike hub motor
The CZJB 90HZ 250W hub motor delivers outstanding cost performance for everyday e-bike applications. Designed for 7-speed freewheel systems, it can also support single-speed setups with an optional adapter, providing flexible compatibility for different market needs. Reliable, compliant, and built on CZJB’s proven motor expertise.
Rated Power: 250w/350w
Max Torque: 42Nm
Reduction Ratio: 1:5.17
Specifications
Motor Drawing
Specifications
| Position | Rear |
| Construction | Gear |
| Rated Voltage（V） | 24/36/48 |
| Rated Power（W） | 250/350 |
| Weight（Kg） | 3 |
| Reduction Ratio | 1：5.17 |
| Max Torque（N.m） | 42 |
| Wheel Diameter（Inch） | 16-28 |
| Rated Speed（km/h） | 25 |
| Spoke Specification | 36H*12G/13G |
| Dropout(mm) | 138 |
| Brake Type | V/Disc brake |
| Operating Temperature（℃） | -20-45 |
| Efficiency（%） | ≥82 |
| Color | Black/silver |
| Cable Location | Shaft side left |
| Noise Grade（dB） | ≤55db |
| IP Grade | IP65 |
| Drive and Freewheel | 6/7S |
Motor Drawing
