Forged from 6061-T6 aluminum, these cranks are built tough. They are the perfect utilitarian crank with a touch of sleekness that makes them look good on all kinds of builds. Chainrings are shot-peened. 130BCD 44t chainring Use 103mm square taper BB for a 45mm chainline For 1/8" chains and 9/16" pedal spindles 165 and 170mm arm lengths