Ibis Boost Rear AxleThis genuine Ibis rear axle is made to fit Ibis Mountain frames that use the Boost 12x148mm standard. Replace your broken Ibis Boost Rear Axle so that you can go back to shredding at your favorite local trails.FEATURESGenuine Ibis replacement partCompatible withBoost 12x148mm Ibis framesAxle requires a hex wrench for proper installation | Ibis Boost Rear Axle Black, 148mm, Shimano