Cooper Tire has announced the addition of 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 a full inch wider than its predecessor, the RM300 HH, with a 20 percent
larger footprint. Coupled with its deep 32/32nds tread depth, it provides up to 25 percent 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. “That’s a key feature of the tire as it will be used off-road where sharp stones can
be a tire’s worst enemy if they’re allowed to drill into the casing. The way we designed this tire helps
preserve the casing for multiple retreads,” Schroeder added.
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,” said Schroeder.