Model 42T or 44T or 46T or 48T or 50T or 52T or 54T or 56T or 58T or 60T Chainring shape Oval Offset, mm 0 (42T-60T) Made from 7075-T651 Aluminum Alloy Surface coating Anodizing Made with CNC milling Ovality 12% Timing 108° after TDC (top dead center) Compatible cranksets 130 BCD (5-bolt) Weight, grams 72 (42T), 82 (44T), 95 (46T) 105 (48T) 117 (50T) 131 (52T) 143 (54T) 156 (56T) 161 (58T) 170 (60T) Chain compatibility Compatible with all 9,10,11-speed chains, 12-speed SRAM Eagle and T-Type, KMC, Shimano HG+ chains. Color Black or Blue or Gold or Green or Orange or Red or Silver or Violet