MG311

$215.00
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The Bafang G311 motor is a compact disk compatible 2.3kg front hub with a nominal 250-350 watt power rating that works great for stealthy systems that do not require significant assist for steep hills or cargo. This motor includes an internal 6-pole speedometer sensor so it can use a CA-DP device and not require an external speedo pickup. It has a spiral gears on the initial reduction of a double stage planetary gear and is exceptionally quiet for a geared motor. This hub is wound with a fast 10.5 rpm/V well suited for 16" and 20" wheels, but can be used in fast 26" and 700c setups as well. Uses 9-pin overmolded Higo Z910 waterproof connector for the motor phase, hall, and speedo wires. Has internal tabbed washers for anti-torque rotation with the dropouts and a round 10mm axle. Does not work with conventional torque arms.

For more details, see the G31X Geared Motor Info Page

Actual Weight (kg) 2.26
Country of Manufacture China
Manufacturer Bafang
Motor Power Range (Watts) 250-500
Motor KV (RPM / V) 10.5
Phase Resistance (Ohm) 0.098
Disk Brake Compatible Yes
Connector(s) Z910
Axle Length (O.L.D.) 100
Spoke Holes 36 Hole
Nominal Wheel Size Unlaced
Motor Type Geared
Flange Spoke Diameter (mm) 123
Magnetic Pole Pairs (Phaserunner) 88
Speedo Poles (for CA) 6
Hysteresis Losses (N-m) 0.666
Eddie Losses (N-m / rad/sec) 0.015
Motor Inductance (H) 0.000124

 

G311 Motor Dimensional Diagram

G311 Motor, 3D CAD Model

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