(ROTOR/BRACKET SOLD SEPARATELY)Guide RE is SRAM's optimized braking solution for today's exciting category of E-MTBs, capable of handling the higher average speeds, more intense use and increased mass due to the presence of the motor and battery. It combines SRAM's proven Guide R lever assembly with a powerful 4-piston caliper derived from the gravity-focused Code brakes. Guide RE provides real, usable on-trail control—optimal power and modulation mean speed can be controlled in all terrain and in all situations, both uphill and downhill.Guide R lever assembly with proven Guide technologies,Powerful 4 piston caliper derived from the Code gravity specific brakes,Sintered pads for better pad life in intensive use,MatchMaker™ X compatible,Ambidextrous lever mount,Tool-free reach adjust.