Model 32T or 34T or 36T or 38T or 40T Chainring shape Oval Offset, mm 0 (32T-40T) Made from 7075-T651 Aluminum Alloy Surface coating Anodizing Made with CNC milling Ovality 12% Timing 108° after TDC (top dead center) Compatible cranksets Shimano XTR M960 Weight, grams 32 (32T), 39 (34T), 49 (36T), 52 (38T), 61 (40T) Chain compatibility Compatible with all 9,10,11-speed chains, 12-speed SRAM Eagle, KMC chains. Not compatible with Shimano 12-speed chains Color Black or Blue or Gold or Green or Orange or Red or Silver or Violet