The idea behind the Spire Crank was to take the proven 2 & ½ piece system and combine it with a super tough, box-section arm design that will remain incredibly stiff and dent resistant.  After a year of testing from Bruno Hoffmann and the rest of the PRO team, the end result is a super strong and reliable crank built to shred.

• Arms Material/Size: Tubular heat-treated 4130 crmo arms 160mm
• Spindle Material/Size:  22mm crmo ultra hollow
• Smooth and rounded ankle friendly spindle
• Drive Side Compatibility: Right and Left Hand Drive
• Weight (Arms and Spindle): 31.8oz/901.5g