The prime rr 38 carbon clincher road wheelset features a 38mm deep aero rim profile to deliver benefits across multiple yaw angles the rr 38 benefits from a wider rim profile as the interface with the tyre creates a more linear contour continuing to increase the wheels aerodynamic properties the prime rr 38 carbon clincher road wheelset utilises a high tg resin 3k fibre brake track that has a textured surface to produce high braking power in all weather conditions the braking surface