Got these to convert my vintage 2004 Trek Liquid 25 with 26-inch Bontrager Race Disc wheels to tubeless. Went on without too much of a struggle, needed a booster pump to seat and seal. Held air well. Rolled better than expected on pavement at about 60 psi (the max, I think). Rolled well on jeep trails and two-tracks. Enough traction for just about anything (when dry), but did not seem to be too much rolling resistance. Like the rest of the bike, got clogged up when we hit sticky mud, but so did everyone's tires and bikes.
Rolls like an xc tire but grips on hardpack, dusty, sandy or tacky trails far better than any tire I've ridden. Completely surprised by its grip!
Looks like continental fixed the crappy sidewall issue too.
Probably not the best for super loose loam & gravely conditions. Works great front & rear. Slightly tight when mounting but nothing crazy.
Used on a street trials bike for multi surfaces. Has mostly been street yet it is an off road tire primarily for trails in all conditions. Have ridden skate parks, bmx track, logs, stones, jumps, and rails. Going tubeless this week and can't wait to continue the ride. My best surprise was black Friday after thanksgiving during a rainy wet rock ride. The tires stuck and hydraulic brakes helped but the surface was slippery. The tire has met all expectations with only a month in from weather, drifting soil, and street trails. They rule. I expect to repeat and grab the Race Kings.