Model 28T, Offset 2.9mm or 30T, Offset 2.9mm or 32T, Offset 2.4mm or 34T, Offset 1.3mm or 36T, Offset 0.9mm or 38T, Offset 0.9mm Chainring shape Round Screw Size M8.5 x 0.75 Offset, mm 2.9 (28T-30T), 2.4 (32T), 1.3 (34T), 0.9 (36T-38T) Made from 7075-T651 Aluminum Alloy Surface coating Anodizing Made with CNC milling Compatible cranksets SRAM XX1 (76 BCD 4-bolt) Weight, grams 35 (28T), 42 (30T), 47 (32T), 53 (34T), 61 (36T), 69 (38T) Chainline, mm 46.4 (28-30T), 46.9 (32T), 48 (34T), 48.5 (36-38T) Chain compatibility Standard Color Black or Blue or Gold or Green or Orange or Red or Silver or Violet