Bridgestone/Firestone North American Tire, LLC has debut its Greatec wide base radials, now available in the 445/50R22.5 size. Since the diameter is equivalent to low-profile radials for 22.5-in. wheels, switching to these tires doesn’t change vehicle height.

Greatec radials are designed to directly replace tractor dual assemblies without need to modify axles. On trailers, retrofit may be possible using 2-in. offset wheels. Such a change may also require a change in the GAWR of the axles. According to Bridgestone it is critically important to consult the manufacturer before retrofitting trailers with any brand of wide based radials.

Bridgestone estimates that Greatec radials could reduce overall vehicle weight by 600 to 1,200 lbs. Compared with conventional, non-fuel efficient dual tire assemblies, Greatec radials could save 2 to 5% on fuel savings, Bridgestone said.

Greatec radials for drive axles have a 26/32” tread depth and a pattern that resembles Bridgestone M726 and M726 EL drive radials.

Greatec trailer axle radials have a 14/32” tread depth and a pattern similar to the Bridgestone R195F trailer radial.

Maximum load capacity for each Greatec radial is 10,200 lb. at 120 psi; they are designed for use at a maximum sustained speed of 75 mph.