Kit contain: Motor, spoke, alloy ring, tire, controller, changer for lead-acid battery, brake handle, throttle, battery cable. 
Motor type: Brushless dc hub motor
Front motor: 250w-1000w
Front fork width: 90mm
Rear motor: 24-72v 250w-1000w
Rear motor fork witdth: 135mm without sprocket
Efficiency: >83%
Wheel size: 20-28 inch rim