Disc Brake Sram Motive Silver A1 Rear Post Mount - BlackDisc Brake Sram Motive Silver A1 Front Post Mount Black Born from the legacy of two of the winningest brakes of all time, SRAM Motive Silver matches the capabilities of XC race and trail bikes. Modern stealth aesthetics and a bold polished black finish pair with wireless superbikes, while a sculpted 4 piston caliper delivers tunable heavy duty power for traction and control. Motive opens the aperture on whats possible, giving you the boundless power