Prime ct 35 tubular disc road rimthe prime ct 35 carbon tubular disc road rim has been specifically developed for disc brake wheel builds thus negating the need for a brake track our 25mm wide rim profile is optimised for use with wider tyres ranging from 25c to 33c for road use 25c to 30c tyres can easily be accommodated the use of wider tyres offer many benefits a wider contact patch for increased traction and cornering grip reduced rolling resistance and added comfort associated with hig