I've got Vittoria Terreno Dry 40mm I've only done one 55km ride on them and think there a great tire but they did feel sluggish on road. Saying that though I'm use to 25 to 20mm road race tires haha and was running 35- 40psi. Impressive grip though off road and railing high speed turns on the black top. My only other experience with gravel style tires are Sammy Slicks in 35mm. They were fast fast on road but that was in a time when high pressures were the norm too.