The Profile Column Spline Drive cranks are a stronger, stiffer and more street friendly version of Profile's classic 3-pc crank design. The Column cranks feature 4130 tubular chromoly arms designed for spline drive sprockets only, wraparound spindle and pedal bosses, a 22mm hollow heat-treated chromoly spindle for maximum strength, and hollow flush mount spindle bolts. Made in the USA.
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