For Single Speed Bikes, Fixed Gear Bicycles, And Track Road Bikes, Cysky Single Teeth: 60T (outer diameter:240 mm) Crank Arm Length: 170mm (6.69 inch) BCD: 130mm (5.12 inch) BB: 110mm-113mm (not include) Weight: Approx 815g/set Material: aluminum alloy 7075-T6 Features: anodized CNC cutting surface Fit for:Single Speed Bikes, Track Road Bike, Fixed-Gear Bike etc Package Includes: 1* 60T Bike Crankset Set FAQ Q: How many teeth on this crankset? A: 60T Q: What is the lenght on this arm? A: 170mm Q: Does this Crankset come with both crank arms or just the drive side? A: Come with both Q: What pedal size does this Crankset work with? 9/16 or 1/2? A: 9/16" Q: What is the BCD of this Crankset? A: 130mm Q: What chain width does it use? A: Standard 1/2" X 1/8" Q: Does this work on a square taper Crankset? A: It is a crankset made for square taper bottom brackets Q: What size bottom bracket should be used for a single speed bike? A: Shell Width is 68 mm, Spindle Length depends on the frame you are using - if you can get it from the manufacturers website, that would be the best bet Q: Does this Crankset come with a bottom bracket? A: No Add The Single Speed Crankset to Your Cart, Have a Great Ride Experience TEETH: 60T, CRANKARMS: 170mm, BCD: 130mm (Not include Bottom Bracket) Pedal Size: 9/16". Chain Size: Standard 1/2" X 1/8" 170mm crank arm length without any overlap of crank arm and chainring bolt Material: aluminum alloy 7075-T6. Burly and lightweight forged crankset for ultimate strength and reliability FIT for: Single Speed Bikes, Track Road Bike, Fixed-Gear Bike etc