Sram Guide/Trail Disc Brake Pads Sintered Steel - 1 SetSRAM Avid X0 Trail Brakes are designed to slow you down in a hurry, and nothing contributes to that more than the pads. Perhaps that's why few would argue that there is a special joy one feels when they know their bike is equipped with a set of pads that allow you to control yourself on the steep stuff without them over heating or failing. Metallic (Sintered) pads last longer, handle heat better, and resist fade better under heavier braking loads,