Toyo Tire says its M137 premium high-performance steer radial for longhaul over-the-highway applications is designed to deliver more miles per 32nds to operators driving coast-to-coast. The company also recently introduced its M154 ultrapremium all-steel regional highway tire for medium trucks.
A new tread design provides even contact pressure distribution across the tread surface, resulting in smooth wear and extended tire life, according to the company, while an innovative casing profile minimizes growth of the tread and maintains a more uniform and flatter tread radius throughout services, also improving tire life.
Toyo says the M137 also has excellent profile retention as a result of e-balance technology, which reduces strain at the belt and ply turn-up edges; during operation, special cap and base tread compounds reduce heat at the belt edge and excessive heat buildup inside the tire structure.
Its 15/32nd deep five-rib design is coupled with deep sipes and four straight multipitched grooves to facilitate enhanced water drainage and wet traction in challenging weather conditions. Vehicle safety also is improved, the company says, while tire noise is reduced with the aid of T-Mode, Toyo’s computer tire simulation technology. The M137 is available in two sizes, 295/75R22.5 and 285/75R24.5.
The new tread design of the M154 helps provides even contact pressure distribution across the entire tread surface, the company says; its 22/32nd deep five-rib design, coupled with deep sipes, helps provide additional water drainage for wet weather traction. The M154’s tread features a straight differential rib in the outer groove to help prevent uneven wear by channeling uniform distribution of friction energy throughout the tread surface; additionally, numerous sipes in the outer groove help prevent “river wear” by absorbing energy at the rib edge. A stone ejector groove in the center tread helps limit stone retention, the main cause of a potentially damaging condition known as “stone drilling.”
Toyo says the M154 has an optimized casing profile that helps minimize growth of the tread area and maintains a uniform, flatter tread radius during service; this design also results in added casing durability and retreadability. The casing profile, along with special cap and base tread compounds, help reduce shear strain at the belt edge and eliminate excessive heat buildup inside the tire, according to the company.
The Toyo M154 will be available this spring in a 295/75R22.5; future sizes include a 285/75R24.5 in the summer; 11R22.5 and 11R24.5, both in LRG and LRH, in the fall; and near the end of 2008, 265/75R22.5 and 245/75R22.5.
For more information, go to www.toyo.com.
