The versatile Thunderer RA401 is a commercial truck/bus tire that's suitable for all positions, in regional or long-haul applications. Features & Benefits Advanced tread compound offers long wear along with low rolling resistance Four circumferential grooves divert water from contact patch to resist hydroplaning Generous sipe pattern enhances wet-weather grip 22/32" tread depth 110-120 psi inflation Available in a wide range of sizes for various fitments