Jagwire LR2-E rotors feature an integrated magnet for use with E-bike speed sensors Compatible with Center-Lock hubs. 2-piece design features an aluminum spider and a separate stainless steel brake track. Stainless steel machined braking surface resists corrosion and is tuned to reduce braking noise. Aluminum spider features an integrated concentric ring and reinforced rivet joints to resist warping and improve durability. For rear wheel use on E-bikes with dropout-mounted speed sensors. Compatible with all popular disc brake pad compounds (organic/resin, metallic, and semi-metallic). NOTE: LR2-E rotors are NOT compatible with brakes with pads that extend below the caliper body. Examples include Avid BB7, Avid Juicy, Hayes HFX, and Hayes MX1. Item Specifications: Hub/Disc Compatibility: Center-Lock Disc, Pad Compatibility: All Pad Compounds, Rotor Size (mm): 203, Rotor Type: Two Piece,