For use with Ultra-Torque chain sets where the axle joins in the middle of the chain set. The Ultra-Torque system aluminium cups ensure maximum fluidity of movement and robustness for the bottom bracket axis. Careful studies conducted by the Campy Tech Lab engineers allowed material to be removed in zones that could be lightened but at the same time points of stress were strengthened. To make the bottom bracket more efficient the axle has varying thicknesses obtaining an incredibly light axle while offering absolute rigidity. Maintaining the lateral measurements already defined guarantees maximum compatibility.