Sturmey Archer FCT22AD Single Speed Crank with a classic look and a very good price-performance ratio. 7075 alloy crank arms (170mm crank arm length), bolt circle diameter: 130mm, colour: silver polished. Wide track chainring for 1/2 x 1/8" chains made of 6061 alloy with 42 teeth, colour: black anodized, silver steel chainring bolts, total weight: approx. 653g. Compatible with JIS square taper bottom brackets (not included!). With a bottom bracket with 103mm axle length this crank has a chain line of 43.5mm.