So fast they need the best braking weight 1450 grams pair without tyre ultralight full carbon clincher the lowest inertia in the category weigh just 450g giving you instant acceleration 18 spokes on the front wheel and 24 on the rear so you get increased lateral stiffness and optimal power transfer superior aerodynamic performance 40mm wind tunnel tested naca profile rim 25mm external width 17mm internal for perfect tyre integration and superior handling in all conditions patented ellipt