Aztec V-type Insert Brake Blocks are the ideal replacement for cartridge-style V-brake carriers. Sold in a handy pack of two pairs, they're made of sturdy Aztec compound and will help provide superb braking power whatever the weather.They're compatible with the Aztec V-type System, Shimano mountain bike cartridge systems and many other third party models. All you need to do is slide out the worn pad and slip in the new one without having to reset the brake pad position.Replacement insert pads to fit cartridge style V-brake carriers.Key Features:Compatible with the Aztec V-type System, Shimano mountain bike cartridge systems and many other third party modelsRemoves the need to re-set the brake pad position, just slide out the worn pad and slide in the new oneHigh performance Aztec compound and design for long life all weather braking powerCompound designed specifically for use with alloy rimsSecured in place by two small split-pin which are includedSupplied as a pack of two pairs