Fly's 3-piece cranks feature a unique spindle system which means that although these cranks are still 3-piece you only have to tighten one bolt to tighten the whole crank set. The arms themselves are heat treated and machined internally to make them both strong and light. The cranks use a heat treated hollow 22mm spindle.
This is for the BRAND NEW 2012 Dolmen Fly Cranks. These have slightly different welding (making them stronger and lighter than previous version) and the Fly logo engraved in the arm! Updated image coming soon. 3 Years of Design, Development and TestingSuper Light & Super StrongUnique 2.5 Design4130 Cro-mo, Internally Machined Crank Arms, 175mmStrengthening Plates on Crank ArmsSingle Allen Fixing Bolt - for easier installationThe Easiest-to-Fit Cranks availableHollow, Butted 22mm SpindleRHD/LHD CompatibleWeight: 775g