The Falken High Country All Terrain worked great on rocks at street pressure as well as trail mode. We aired down to 10 psi and couldn't stop the tires from grabbing. Because mud is not an all-terrain tire's forte, we were surprised and pleased that they performed so well. Spinning the tires even flung the slop out of the smaller voids and allowed the tire to gain traction. Sliding and drifting on dirt was a challenge. The tire grabbed the ground well, even at higher pressure. They also exhibited little noise on the trail or the highway, even at high speeds and low pressure.