The advantage is in the rim: no holes & therefore no rim tape, to the benefit of both stiffness & weight. The Racing 3 continues to represent the most reliable "travelling companion" for training rides & the "ideal partner" for any type of race. Racing 3 with Shimano Inc. Fw body is compatible with 10 & 11 speed sprockets. Differentiated Rim Height 26mm at the front for optimal manoeuvrability; 30mm at the back to transfer all the power to the wheel. Double-butted Steel Spokes With Aero Profile enable maximum aerodynamic penetration. finest top quality Steel Balls With Cup-&-cone Bearings reduces friction & provides top performance. The cup-&-cone system makes it easy to adjust the bearings. Aluminium Axle reduces the overall weight of the wheel. New Oversize Flange 9% more torsional stiffness. Greater reactivity to each change in pedalling tempo & more efficient power transmission to the wheel S.h.a.r.c. smoothness: 8 handling: 9 aerodynamics: 8.5 reactivity: 8 comfort: 8.5 1550 g