The campagnolo bora ultra 50 wheelset features cult ceramic bearings which provide extreme smoothness the lowest friction coefficient thanks to oil lubrication and are 9 times more efficient than standard bearings and will spin for up to 47 minutes after being run at 500rpms the campagnolo bora one 50 wheelset has been attacked by the campagnolo engineers to create a braking surface on carbon rims above and beyond anything found on carbon rims to date the result is ac3 all conditions carbon