Internal 5:1 planetary gearbox allows the motor to spin faster than the wheel, significantly increasing efficiency and torque compared with gearless (direct drive) hub motors. BMC motor composite gears are far superior to nylon gears commonly used on lower power geared hub motors and are capable of handling power exceeding 1000 Watts. They can be expected to last at least 5-10 thousand miles without any maintenance.
If you like pedaling with the motor off, BMC is the right choice for you. Built-in clutch/freewheel disconnects the motor from the wheel when not powered, which eliminates motor drag on throttle down.
Axle seals protect the motor from dust and moisture.
This motor accepts standard 6 hole MTB disc brake rotor, and a standard freewheel cogset, 7 or less speed freewheels recommended, but 8, 9, and 10spd freewheels will work with a spacer washer (included). 36 spoke holes.