Crystalyte H4040 UFO Rear Motor with 148 x 12 Boost Size Thru Axle Standard
Note: New torque arm design

Crystalyte H4040 UFO Rear Motor for 148x12 Boost Size Thru Axle Bike Frames
  • 40mm wide stator and magnets for extra power
  • Full 18mm of space from the disk boss to the side cover, allowing for compatibility with majority of disk calipers
  • Cable routing terminates with waterproof L1019 plug with built in themistor tor temperature sensing
  • Uses threaded freewheel instead of cassette freehub. 8 and 9 speed freewheels require additional axle spacer
  • Integrated torque arm - use Thru Axle Frame Clamp if you do not want to fabricate your own frame holder
More Information
Country of Manufacture China
Actual Weight (kg) 7.46
Motor Power Range (Watts) 1000-2000
Motor KV (RPM / V) 9.5
Phase Resistance (Ohm) 0.123
Disk Brake Compatible Yes
Connector(s) L1019
Thermistor Style 10K NTC, B~3900
Axle Length (O.L.D.) 148
Spoke Holes 36 Hole
Motor Type Direct Drive
Flange Spoke Diameter (mm) 232
Magnetic Pole Pairs (Phaserunner) 23
Speedo Poles (for CA) 23
Hysteresis Losses (N-m) 0.77
Eddie Losses (N-m / rad/sec) 0.0185
Motor Inductance (H) 0.0005
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