— The Tire Industry Association (TIA) has published OTR tire and wheel weight charts covering more than 150 earthmover and industrial/forklift tires and tire/wheel assemblies. These comprehensive ...

And the 15 is the size of the wheel it's designed for. So, in this case you've got a 31-inch tall tire for a 15-inch wheel. You know the wheel radius is 7.5-inches, and the tire radius is 15.5 inches.

Truck tires are more than “where the rubber meets the road.” Understanding truck tire sizes, tire load ratings, why ply no longer matters, and more is important for today’s fleet managers.

If you look at the side of your vehicle's tires, you'll notice a line of numbers. One of these number sets is the tire load index. Here's what that means.

Q:Our 2004 F-150 with a 4.6-liter V-8 and 3.73:1 gears lost mpg when I changed the tire size from 235/70R17 to 265/70R17 (Fuzion LT tire). I was hoping a taller tire would reduce rpm and improve ...