Bridgestone Firestone North American Tire (BFNT) offers Greatec wide-base radials in the 445/50R22.5 size, equivalent in overall diameter to regular low-profile radials for 22.5" wheels. Switching to Greatec radials does not change vehicle height, an advantage over other wide-base radials.
The wide footprint of Greatecs also meets requirements imposed by state laws regulating footprint pressure as a function of tread width. Greatec radials are designed to directly replace tractor dual assemblies without modifying axles.
Greatecs could also save about 2% to 5% on fuel consumption compared with non-fuel-efficient dual tire assemblies.
These radials are built using a new casing structure that incorporates what BFNT engineers call a Waved Belt design. The radials employ belts built from steel cords that are not straight, but formed into a gentle “waved” shape.
Greatecs for drive axles have a 26/32" tread depth and a pattern that resembles that of the Bridgestone M726 and M726 EL drive radials. The tread incorporates solid shoulder ribs to combat side forces that can lead to irregular wear and a stiff, staggered tread block design to resist “heel-and-toe” wear.
Greatec trailer axle radials have a 14/32" tread depth and a pattern similar to the Bridgestone R195F trailer radial. They also feature the company's patented Equalizer Rib design. This consists of small ribs that absorb irregular wear forces, helping protect the larger, main ribs beside them against river and wavy wear.
Maximum load capacity of each Greatec radial is 10,200 pounds at 120 psi, and the tires may be used at a maximum sustained speed of 75 mph. Special 14"-wide aluminum wheels are provided by a number of manufacturers.
For more details, contact BFNT, 535 Marriott Dr, PO Box 140990, Nashville TN 37214-0990.
