Features: brand new and high quality Applicable Models: Road bike Bcd: 110BCD 130BCD Contact us if you have questions. Gear:34T 39T 50T 53T Product: Bicycle Crown Specifications: Brand: Prowheel Material: Steel, Aluminum R1---110BCD, 4 Claws, 34T, 10/11 Speed, AL-6061 R2---110BCD, 4 Claws, 34T, 10/11 Speed, AL-7075 R3---110BCD, 4 Claws, 50T, 10/11 Speed, AL-7075 R4---110BCD, 4 Claws, 50T, 10/11 Speed, AL-6061 R5---110BCD, 5 Claws, 34T, 9/10 Speed, AL-6061 R6---110BCD, 5 Claws, 34T, 8/9 Speed, Steel R7---110BCD, 5 Claws, 50T, 10/11 Speed, AL-7075 R8---110BCD, 5 Claws, 50T, 10/11 Speed, AL-6061 R9---110BCD, 5 Claws, 50T, 10/11 Speed, AL-6061 R10---110BCD, 5 Claws, 50T, 9/10 Speed, AL-6061 R11---110BCD, 5 Claws, 50T, 8/9 Speed, Steel R12---130BCD, 5 Claws, 39T, 10/11 Speed, Steel R13---130BCD, 5 Claws, 39T, 11 Speed, AL-7075 R14---130BCD, 5 Claws, 39T, 10/11 Speed, AL-6061 R15---130BCD, 5 Claws, 39T, 10/11 Speed, AL-6061 R16---130BCD, 5 Claws, 53T, 10/11 Speed, AL-6061 R17---130BCD, 5 Claws, 53T, 10/11 Speed, AL-7075 R18---130BCD, 5 Claws, 53T, 10/11 Speed, AL-6061 Package Includes: 1 x Bike Chainwheel. note: There are many styles for this model. You can confirm the BCD, the number of teeth and the speed of your cranks before purchasing and choose according to the parameters. If you have any questions, you can contact Customer Service at any for time.