Nexen Roadian HTX RH5 – 255/70R15 (113/110S) .The Roadian HTX RH5 contains a four-channel groove design in forward direction to enhance drainage and hydroplaning performance on wet roads. The three- and four-division tread design improves grip while enhancing wear performance. The reinforced shoulder block design results in improved cornering and handling, while a center rib block design optimizes grip and steering performance.