Model 38T or 40T or 42T or 44T or 46T or 48T or 50T or 52T or 54T or 56T or 58T Chainring shape Round Offset, mm 2 (38T), 0 (40T-58T) Made from 7075-T651 Aluminum Alloy Surface coating Anodizing Made with CNC milling Compatible cranksets 130 BCD (5-bolt) Weight, grams 54 (38T), 53 (40T), 63 (42T), 72 (44T), 73 (46T) 82 (48T) 94 (50T) 109 (52T) 116 (54T) 136 (56T) 147 (58T) Chain compatibility 10/11/12-speed chains : including Shimano HG+ and SRAM AXS flattop (incl. T-type) chains Color Black or Blue or Gold or Green or Orange or Red or Silver or Violet