Durable and stiff Hollowtech crankset for track riding in classic Dura Ace design and approved Octalink technology. Reinforced 5-arm crank spider with 144mm bolt circle diameter. Chainline: 42,5mm. For Octalink bottom brackets BB-7700 and BB-7710 with 109,5mm axle length. Note: Delivery includes crankset without bottom bracket and chain ring! Specifications Material: Aluminium Weight: approx. 505g (without chainring and bottom bracket) Axle profile: Octalink Bolt Circle: 144mm Colour: silver polished What's in the Box? Crankarms only without chainring and bottom bracket