My gravel bike is currently running 42mm S-works Pathfinder Pros. I was aiming for a fast rolling set up with these and it does that well...these are a really great set up for light gravel or a gravel/road mix. In the future, I might set up another wheel set with 2.0" XC MTB tires...more specifically, the Continental Race Kings(if they'll actually fit.) Not to get too nerdy but, these tires test faster than most gravel tires on the rolling resistance website...I run the 2.2" version on my XC bike and can confirm that they are fast, but with better traction.