These pads are designed for Zipp carbon rims to delivers smooth speed control and reliable stopping power in all conditions, wet or dry. They are also designed for a longer wear life. Features: Groove design sweeps water off rim for improved wet-weather braking performance and also channels air over rim to improve cooling The Tangente pad may be used on any tubular or clincher rim with a carbon braking surface, but it should never be used on aluminum braking surfaces Specs: ColorGray Pad Attachment StyleBolt-In (Caliper) Rim CompatibilityCarbon Intended Brake TypeCaliper Pad TypeReplacement Insert - Cartridge