This tire seems to me to be the “mountain biker’s gravel tire”. A tire for rougher adventures, dirt roads, mountains, and even light single track.
It (the Kimberlite) felt less wooden and stiff than the previous versions of American Classic tires and more akin to a tire costing much more.
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.
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.
WTB has some really good non-puncture protected gravel/all road tires in their line, but there was no puncture protected version, until now. The SG2 gravel tires seem to be a good addition to the range as long as you understand that the width indicated on the side wall may not match the width of the tire in reality.