Originally Posted by WhyFi

I've taken 35s and 38s (both Schwalbe G-Ones, very good tires) out on the group road ride (on short notice when I've had problems with the road bike or road wheelset). They're pigs in that setting. At steady speeds they rolled just fine, so paceline situations were no problem. Accelerating out of corners or even up little kickers was a noticeably different, and not in a good way, even though I'm of the sprinter-type and can usually close a gap in my group pretty easily. If your group is pretty steady in pace, maybe you'll happy with them. If your group is spirited and has frequent surges, you're probably not going to like them, unless you're too strong for your group and you need to spice things up because you're bored out of your mind.