Lyla Bike 50-58T 9-11 Speed Crankset 170mm Crankarms 130BCD Chainring Black 52T Cycling Tool Kit

Description:Made of premium aluminum alloy, CNC machined and electroplating process - bright, corrosion resistance, ultra-light but high strengthSpecifications: 50T 52T 54T 56T 58T; standard 130mm BCD; 170mm Crank ArmsNarrow wide tooth design increase the contact area with the chain greatlyComes with 5 bolts for easy and convenient mounting Specification:Teeth Length: 7.2mm/0.28 inchThickness: 4mm/ 0.16 inch 50 T:Diameter: 208mm/ 8.2 inch 52 T:Diameter: 216mm/ 8.5 inch54 T:Diameter: 224 mm/ 8.8 inch 56 T:Diameter: 231 mm/9.09 inch 58 T:Diameter: 242 mm/ 9.5 inch Package Includes:1 Piece Bike Chainring1 Pair Crank Arms (left and right)Note:The chain must be lengthened if the larger chain ring is replaced.Please allow 1-2mm differences due to manual measurement.When choose large chainring, please confirm that whether its diameter is within an appropriate range, otherwise it will need to replace a longer axle.