Speed 25 wheels were developed with a precise objective: achieve maximum performance uphill. Designed with Fulcrum's premier technologies to marry lightness and handling in a low-profile wheel, the Speed 25 is ideal for cyclists looking to post their best times uphill, but also for ultra-cyclists who deal with adverse weather conditions and want a stable and reliable wheel even in strong gusts of wind. - Carbon Fiber, Disc-brake rims feature an inner rim width of 21mm and profile height of 26mm - 2-Way Fit system lets you fit tubeless tires without rim tape, thanks to the non-drilled bridge - DIMF technology creates a matte finish directly from the mould without the need for paint treatments - USB ceramic bearings guarantee 50% less rolling resistance compared to standard bearings - Minimally-designed hubs paired with flat, aerodynamic spokes - Asymmetrical rear rim provides better dish angles to achieve great lateral stiffness; fundamental for uphill sprints