DECKAS Round Plate 104BCD Mountain Bicycle Chainwheel 32T/34T/36T/38T MTB Bike Crankset Aluminum Chainring Bicycle PartsProduct parameters:Teeth: 32/34/36/38TPitch: 104 BCD RoundWeight: 32 t / 41 g 34 t / 51 g 36 t / 63 g 38 t / 83 gCompatible with: All 7 to 12 speed chain SRAM 11-speed chainColor: Black, red, blue, gold, green,SilverProcess:Full CNC CNC engraving and milling, anodic oxidation, full of the laser markingFunction:Minimize the probability of chain, simplifying the variable speed system, minus the excess weight