The idea behind the Spire Crank was to take the proven 2.5 piece system & combine it with a super tough, box-section arm design that will remain incredibly stiff & dent resistant. After a year of testing from Bruno Hoffmann & the rest of the Pro team, the end result is a super strong & reliable crank built to shred. section Product Specs Type: 2.5pc Spindle Diameter: 22mm
Includes:: BB Bearings: No Weight: 901g / 31.78oz