Cooper Tire's Roadmaster RM351 HD tire is for mixed-service applications

Cooper's new HD tire boasts wider footprint, deeper tread

Feb. 20, 2019
Cooper Tire recently added the Roadmaster RM351 HD tire to its commercial tire lineup.

Cooper Tire recently added the Roadmaster RM351 HD tire to its commercial tire lineup.

Engineered for mixed-service applications such as construction, logging and mining operations, the tire is designed for both on- and off-road driving and comes in two sizes: 11R22.5 and 11R24.5, in load range H. 

The Roadmaster RM351 HD is 1 inch wider than its predecessor, the RM300 HH, with a 20% larger footprint. Coupled with its deep 32/32nds tread depth, it provides up to 25% more miles to removal, depending upon the application.

“That’s a big step forward in tire performance for our Roadmaster customers,” said Gary Schroeder, executive director of Cooper’s global truck and bus tire business. “By going wider, we spread the weight over the tire to gain better mileage, while also improving traction. It’s a win-win.”

To help ensure long tire life, tie bars between the outside lug and the shoulder, along with shoulder grooves that are linked and interlocked, help ward off tire squirm and irregular wear. The sidewall is extra thick with a curb bar protector to help protect the casing from cuts and scrubbing.

For traction and long-life performance, the tire features five lugs that have an open pattern to minimize stone holding while enhancing traction. Stone ejector ledges, coupled with angled grooves, also help prevent stone drilling.

The Roadmaster RM351 HD’s casing itself is extremely robust, with four-belt steel design construction. Cooper provides a six-year, two-retread warranty on the RM351 HD.

“The casing we’ve developed for this tire, along with the warranty, provide life and cost efficiency beyond the original tread,” Schroeder said.