Crank Arm Length: 170mm (6.69 inch);BB: Excluded;Weight: Approx 650g/set;Package Include: 1* 46T Bike Crankset Set;<br> <br> FAQ: <br> Q:How many teeth on this crankset?<br> A: 46T<br> Q: What is the lenght on this arm?<br> A: 170mm (length between two center hole)<br> Q: Does this Crankset come with both crank arms or just the drive side?<br> A: Come with both<br> Q: What pedal size does this Crankset work with? 9/16 or 1/2?<br> A: 9/16"<br> Q: What is the BCD of this Crankset?<br> A: 130mm<br> Q: What chain width does it use?<br> A: Standard 1/2" X 1/8"<br> Q: Does this work on a square taper Crankset?<br> A: It is a crankset made for square taper bottom brackets<br> Q: What size bottom bracket should be used for a single speed bike?<br> 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<br> Q: Does this Crankset come with a bottom bracket?<br> A: No