Specialized does say in the description they are for "modern wider rims" and they aren't kidding, I mounted these on some 20mm Roval SLX wheels and they measured 29mm! narrower than my road tires. Might have to buy a new set of wheels to use these now as they are 4mm smaller than my other tire sets. I've used terra pro in the past with great success (they measure to size) and was excited to get these but so disappointed once they were mounted. The quality of the tire is very good and the weight was as specified, probably do to the small size. You will probably need a 25mm or wider rim to make these work properly.

I put these on after slipping and sliding in the mud at a CX race. These tires did the trick! Better traction, but they also roll fast.

Fantastic Grip

Light duty gravel with a rocky/dusty/loose surface...Tracer Sends it! Railing thru the spiral of death at the local CX race, Tracer Sends it! Low rotational weight, solid flat protection, wicked awesome sidewall color....blah, blah, blah....SEND IT!