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. Also available in a super-short 160mm version for use with shorter 12.5″-13″ chainstay frames. Features - Strong, lightweight crank- RSD & LSD compatible- 22mm hollow heat-treated spindle- Smooth and rounded ankle friendly spindle boss Specifications Material - Tubular heat-treated 4130 crmo arms & crmo axle Length - 160mm, 170mm or 175mm Axle - 22mm crmo ultra hollow Weight - 901g (170mm)
