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 control brake treatment that provides brake feel similar to aluminium in all conditions one of the biggest changes and improvements to the bora one 50 wheelset is the increased rim width moving from 205 to 242 mm this allows the bora one 50 wheelset to imp