BikeMaster brake shoes are strong, stable, and corrosion-resistant direct replacements. BikeMaster begins with high-pressure aluminum die-cast shoes. The friction material is chosen to give your application performance and longevity and bonded to the brake shoes using a high-temperature process. The face of the friction material is machined to make sure that it is a perfect fit to the brake drum and to ensure that the shoes have a perfect radius. The edges of the shoes are chamfered, as well as the leading and trailing edges of the friction material. BikeMaster brake shoes are asbestos-free and come complete with new springs.