Aluminum

Key Product FeaturesCDH Single Speed Crankset 46T 170mm Crankarms 130 BCD (Black) Mountain Road BikeNOTE: Crank arms came with part number "DONSP1986"(second picture showed), some not, random delivery.Single Speed Crankset Set 46T 170mm Crankarms 130 BCD Crankset,Material:Aluminium Alloy 6061-T6; BCD:130mm; Pedal crankarms:170mm; Surface:Anodized;Dimension: approx. 188*115mm / 7.4*4.5in (crankset), 205*34mm / 8.1*1.3in (crank); Fit on square taper bottom brackets between 103mm to 107mm; Burly and lightweight forged crankset for ultimate strength and reliability; These are intended to be used on single speed Mountain Road Bike Fixed Gear BicycleCompatible with 9/16 inch pedals; 1/2"*1/8" chain work well on this cranksetBlack Crankset w/ 46T Sprocket; Square Taper; FAQ:Q:How many teeth on this crankset?A: 46TQ: What is the lenght on this arm?A: 170mm (length between two center hole)Q: Does this Crankset come with both crank arms or just the drive side?A: Come with bothQ: 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: 130mmQ: 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 bracketsQ: 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 usingQ: Does this Crankset come with a bottom bracket?A: NoCrank Arm Length: 170mm (6.69 inch);BB: excludedWeight: Approx 650g/setPackage Include: 1* 46T Bike Crankset Set