The Kimberlite is a tire that American Classic says is meant for pavement and mixed-surface rides. However; here at Riding Gravel’s home, we have found that a minimal amount of tread works fine on deeper, loose gravel.
News breaks today of updates to that range of tires. The company has a new puncture protection system and has lowered weights across the range as well as engineering in a lower rolling resistance for their tires across the range.
Oddly, the Vulpine isn’t as fast a rolling tire on gravel which is loose, chunky, and deep as other tires with similar width. However; once you get out of situations where the terrain is loose and deep, the Vulpine begins to show up as a fast, controllable tire.