Raced on Vittoria Corsa G+ and clincher version GP5ks. Meh the same in terms of grip. Although 5ks are even more fragile than Corsa, and I didn't think that was possible. Already had to replace two after Stage race due to sidewall cuts. After Road Race last Saturday found rear completely flat the next day. The front went flat after critirium race. Haven't bothered to look yet closely what punctured it. Honestly I wouldn't use them for every day riding.