[EU/UK Direct] CSC SW900 36V 500W Ebike Conversion Kit, High Power Hub Motor Wheel Fits Marlin 4, Rockrider ST100, River1 Applicable Bike ModelFrame Requirements About the Frame For Front Wheel Installation Requires a standard 100mm Front Dropout width Compatible with almost all standard bicycle forks regardless of drivetrain type For Rear Wheel Installation Requires a 135mm 142mm Rear Dropout width AND must use a standard 6 7 speed threaded freewheel NOT compatible with cassette spline hubs 26 27 5 29 700C Bikes Compatible Τrek Marlin 4 Note Marlin 5 6 and 7 use cαssettes and are only compatible if you choose the Front Wheel version Decαthlon Rockrider Rockrider ST 50 Rockrider ST 100 Note Higher ST models use cαssettes Decαthlon Riverside 120 Note Riverside 500 uses … $359.99Banggood.comDelivery: in USA ReportBuy!