The mavic ksyrium pro exalith haute route wheelset has been carefully thought out with the application of mavic technologies featuring ism 4d rims to keep weight low whilst improving the aerodynamics of the wheel the aerodynamic properties are continued with the wider 21mm external rim to allow the use of wider tyres which also reduces rolling resistance and increases rider comfort the mavic ksyrium pro exalith haute route wheelset uses mavics exalith 2 braking surface exalith