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Designed with the help of FEA to be a set of extremely strong but not overbuilt 3 piece cranks the Akimbo cranks have 175mm arms with a smooth shape with a laser etched logo and are made with heattreated 4130 chromoly. The 22mm 48 spline hollow spindle attaches to the arms via spindle bosses that fit standard crank arm bolts and micro drive bolts and hollow M15x1.0 7075 aluminum spindle bolts. The crankset also includes a crank installation/removal tool and grease pack.