... -brakes are available life>1000times, with two fuses on the battery pack Frame Steel material Handle bar & stem ZOOM, alloy,stem ... Rims alloy black,silver side edge Wheel size 26" Derailleur 6-Speed Brakes V- brake , disc brake front disc brake & rear ... be turned over Working style intelligent pedal assistance & cruise Battery 48V/17AH lithum battery,charging life>1000times, with two fuses on the ...