SRAM Motive Ultimate Disc Brake Caliper Assembly - Front/Rear, Post Mount, 4-Piston, Silver, A1+Motive features sculpted 4 piston calipers to deliver tunable heavy duty power for traction and control, opening the aperture on what's possible. Giving you the boundless power of more confidence, and in the process redefining what's required from a low weight brake. Compatible with SRAM models: DB MOTV SLV A1, DB MOTV ULT A1 Hose sold separate Features Bleeding Edge bleed port for drip free maintenance Designed for use with Maxima Mineral Oil only