Utilizing a 2-piece construction design, Jagwire LR2 rotors have a stainless steel braking surface to provide quiet, consistent stopping power. The lightweight aluminum spider features an integrated concentric ring and reinforced rivet joints to resist warping and improve durability.Stainless steel machined braking surface resists corrosion and is tuned to reduce braking noiseAluminum spider helps keep weight to a minimumCompatible with all popular disc brake pad compounds (organic/resin, metallic, and semi-metallic)