Most Montanans know reliable winter tires can make all the difference. However, rapidly shifting temperatures cause the air in your tires to expand and contract.

Regular readers of Heavy Duty Trucking may know me as The Tire Guy. I've written the magazine's tire feature every month for the past four years or so. I got a dose of my own medicine on Christmas Day ...

Try walking in deep sand on your favorite beach and you'll have an inkling how under-inflated tires affect fuel economy. It's easy going when you're down near the water and the sand is hard. Go ...