CenterLine X Rotor CenterLine X rotors are the lighter-weight version of SRAM’s quiet, smooth and robust CenterLine rotors, featuring a two-piece design with an alloy center and steel brake track. Specs Specifications for CenterLine X Rotor WEIGHT 140mm: 86g, 160mm: 102g, 180mm: 125g MATERIAL Aluminum center, steel brake track OTHER 6 bolt and CenterLock hub interfaces
