Fulcrum Racing 1 Road Wheelset The Racing 1's have had great graphics makeover & now feature the mega drive hub flange increasing the stiffness of the rear wheel. Racing 1 wheels have competition in their DNA. If you&8217;re looking for a lightweight wheel that gives the best performance under any condition & has a marvelously aggressive look, you&8217;ve found it. Differentiated rim heights &8211; 26mm at front for optimal maneuverability; 30mm at rear for optimal power transfer. Triple milling of the rim saves weight but also creates an aerodynamic profile. Fulcrum Dynamic Balance keeps the Racing 1 wheels perfectly stable but is achieved in the rim milling process rather than spokes in the Racing 5. Fulcrum 2:1 spoke ratio on rear wheel, double the number of spokes on the drive side for greater wheel stability & enhanced power transfer in the rear wheel. 16 radial aero spokes on front wheel, 21 on rear. Weight: Front 635g, Rear 850g Racing 1 wheels are compatib