Compatible with Shimano 9, 10 and 11-speed / Mega Range, SRAM X0/X9/X7, Apex, Rival, Force and Red (> 2011) and Campagnolo 11-speed.Key Features:11T.,RollerBoys equipped with low friction ceramic bearings for ultra-smooth glide and exceptional durability.,Special teeth pattern for quick shifting performance.,Lubricated with special ceramic light oil for extra smoothness.,Composite material provided by EMS Swiss, with 40% glass-fiber mixture.,Complete set of bushings for different shifting systems included.,Bearing type: Ceramic.,Compatible with: Shimano, Campagnolo, SRAM.,Made of: Grivory EMS..