Model 28T, Offset 1.7mm or 30T, Offset 3,5mm or 32T, Offset 3,5mm or 34T, Offset 2.9mm or 36T, Offset 1.6mm or 38T Chainring shape Oval Offset, mm 1.7 (28T), 3.5 (30T-32T), 2.9 (34T), 1.6 (36T), 0 (38T) Made from 7075-T651 Aluminum Alloy Surface coating Anodizing Made with CNC milling Ovality 12% Timing 108° after TDC (top dead center) Compatible cranksets FSA 86 BCD (3-bolt) Weight, grams 37 (28T), 48 (30T), 50 (32T), 55 (34T), 60 (36T) Chainline, mm 47.6 (28T), 49.3 (30-32T), 50.2 (34T), 51.2 (36T), 52.3 (38T) Chain compatibility Standard Color Black or Blue or Gold or Green or Orange or Red or Silver or Violet