RoadKing Shocks’ new big bore mono tube shock absorbers are the biggest-bore shocks available for Class 8 trucks, the company says, and deliver up to 10 times more control force. RoadKing’s shocks keep the tire connected to the road surface, saving money and reducing driver fatigue at the end of the run, the company says. The 2 5/16-inch shocks have a 4.2-sq.-in. piston area. The absorbers have spherical rod bearing mounting, two urethane shaft oil seals and a salt-spray chrome shaft. The absorbers can be factory re-built and are designed to go from 350,000 to 400,000 miles between rebuilds.