I had a pair of Zipp 808 Tubular wheels with Conti Ultra Gator skins .
About 110psi , I figured if the pro 's run them on the cobbles it should be able to handle a little gravel , and they did !
I had a pair of Zipp 808 Tubular wheels with Conti Ultra Gator skins and about 110psi , I figured if the pro 's run them on the cobbles it should be able to handle a little gravel , and they did !