SRAM Eagle 90 Ebike Groupset 165mm Brose 36T Clip on Guard Chain XS 1275 10 52t Single Click Shifter Rear Derailleur Primal Wear Brakes: Four piston hydraulic brakes with Wheel 24x3 Kenda Road Brakes: Four piston hydraulic brakes with electric braking for unparalleled stopping power The integrative power button next to the right handle makes the scooter operate easily and handily Shifting under load is a signature of Eagle Transmission and this is made possible on 90 with an XS 1275 T Type cassette that features full X Sync technology and a premium double click T Type Actuation mechanical shifter Cockpit tidying Shift Housing Brake Hose clip included