These Sram Guide/Avid Trail Brake Pads are made for the SRAM mountain bike guide brakes. Using SRAMs extensive bicycle knowledge you know it’s going to be a product you can trust. Brake pad options include metal sintered with steel backing, organic with steel backing, or organic with aluminium backing. Sram Guide/Avid Trail Brake Pads Features Options include metal scintered with steel backing, organic with steel backing, or organic with aluminum backing