Description The Sturmey Archer 3 Speed Disc Brake Hub RS-RK3 is an internally geared hub kit for 36H, 135mm OLD, 185mm axle length with an 18T Cog & Twist Shifter. This hub can be custom built into any rim from 20″ upwards. Sturmey Archer 3 Speed Disc Hub RS-RK3 Features 3-Speed with wide gear ratio of 177% Gear steps of 33% and 33% Rotary gear selector without protrusions outside the frame 6061 Aluminium hub shell 36 spoke holes Compatible with 17 to 19 teeth sprocket (comes with an 18T cog) Available in anodised alloy finish & black finish Weight – 1095g Gear Ratio Overall Range – 177% Gear 1 – 75% (Gear 2 – 25%%) Gear 2 – 100% (Direct Drive) Gear 3 – 133% (Gear 2 33%) The RS-RK3 comes with shifter, cable and 18T cog. Need a wheel built? Want to build a wheel with this hub? We build wheels with Sturmey Archer hubs in our workshop in Richmond, give us a call for a quote on our IGH wheel building!