72V 4000W 135/155mm dropout 26″/27.5″/29″ MTX39 Conversion kit Sabvoton 80A
72V 4000W 26″/27.5″/29″ MTX39 Rear wheel kit With Sabvoton 80A 135/155mm
Optional Wheel Size: 26″/27.5″/29″ MTX39 Wheel. 48V,60V,72V 4000W Brushless Gearless Rear Hub Motor Wheel with Single-speed Freewheel, Rated: 48V 3000W- 72V 4000W, Peak: 48V 3840W- 72V 5760W. 36V, 48V, 60V, 72V Colorful TFT UKC1 Display.