Jagwire Mountain Pro Disc Brake Pads for SRAM Guide RSC RS R Avid Trail Compatible with SRAM Guide RSC, RS, R, Avid Trail Lightweight aluminum backing plate Low noise, high performance semi-metallic compound lasts longer than resin Backing Plate Material: Steel These disc brake pads fit a variety of SRAM and Avid brakes and offer industry leading brake compounds for consistent, confident performance.