Bike Chainring: This bike chainring is suitable for 8/9/10/11/12 speed bicycles. It features 34T, designed to fit most cranksets with its BCD of 104mmInnovative Design: The positive and negative tooth design reduces wear and tear, making it less likely for the chain to fall off. This ensures a smooth and efficient ride every time Material: Made from reliable aluminum alloy, this bike chainring is built to last, providing you with long term performance and reliabilityNote: This bicycle chainring is suitable for standard 104mm BCD cranks, please carefully confirm your crank BCD and number of specifications before purchasingProduct Dimensions: Outer Diameter 14.3cm/5.63inch; Crank BCD 10.4cm/4.09inch; Adjacent Hole Distance 7.4cm/2.91inch, making it an ideal size for most mountain bikes Specification: Material: Aluminum Alloy Size Chart: Outer Diameter 14.3cm/5.63inch;Crank BCD 10.4cm/4.09inch;Adjacent Hole Distance 7.4cm/2.91inch Package Includes: 1 Bike Chainring Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.