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.Features-Compatible with Center-Lock hubs-Not compatible with brakes with pads that extend below the caliper body. Examples include the Avid BB7, Avid Juicy, Hayes HFX, and Hayes MX1 -Stainless steel machined braking surface resists corrosion and is tuned to reduce braking noise-Aluminum spider helps keep weight to a minimum-Compatible with all popular disc brake pad compounds (organic/resin, metallic, and semi-metallic)Item Specifications-Hub/Disc Compatibility:Center-Lock Disc-Pad Compatibility:All Pad Compounds-Rotor Size (mm):220-Rotor Type:Two Piece-Weight:230