Saving Gas: Low Rolling Resistance Tires For Your Truck

With gas prices being what they are, many people are looking for low-cost modifications that they can make to their trucks in order to squeeze every possible mile out of a gallon of gas. There are a number of gadgets, additives and devices out there that try to separate drivers from their money with pie in the sky claims, but there are also some ideas and products which seem like genuine, well-researched solutions. Low-rolling resistance tires are an example of a well-researched fuel saving device.

Are low rolling resistance tires a good way to save gas, or a good way to reduce performance?

A little bit of background: the tires on your truck are designed to be a balance between several different performance characteristics. They need to be able to stick to the road in order to provide traction, but they can’t be too sticky, or the engine will have to work that much harder in order to overcome the friction they create. They also need to be made of a material that is soft enough to provide traction yet still wears well, and is capable of lasting for tens of thousands of miles. Finally, the size of the tire and the depth of the tread also contribute to how much energy it takes to get the tire moving, with taller wheels generally requiring more energy. The same is true of knobbier, deeper tread patterns, such as those found on off-road tires.

When taken together, the amount of energy it takes to get a tire moving and keep it going is called rolling resistance. If you reduce the amount of rolling resistance, then all other things being equal, you can reduce the amount of fuel required to move a vehicle. It seems like tires with less rolling resistance would be a great way to improve your truck’s fuel economy. Right?

Well, yes and no. Unfortunately, due to the most commonly used methods of reducing a tire’s rolling resistance, there is a rather significant safety trade off when it comes to grip and stopping power. Since the primary technique used in creating low-rolling resistance tires is to use less rubber and more filler in the tire itself, there is less traction available to your vehicle, and this means that stopping distances increase dramatically. Not only that, but wet weather traction is also reduced, putting you at risk in sharp corners and in heavy breaking situations under rainy conditions.

This isn’t the kind of trade-off most people are willing to make just to save a few bucks at the fuel pump. Fortunately, there are other ways to reduce the rolling resistance of your truck’s standard tires that don’t introduce any safety concerns. Since the size of a tire’s overall diameter contributes to the amount of rolling resistance that must be overcome, you should avoid running oversized, off-road tires on a daily driven vehicle. A smaller tire with a less aggressive tread pattern will help get your truck moving with a lot less effort – not to mention the money you will save on tread wear. A truck with better matched tires will also handle in a safer fashion on asphalt. If you are really concerned about your truck’s rolling resistance, then it’s better to save the swampers for off-road use only.

NOTE: Making sure that your tires are properly inflated (35 PSI is a good number for most uses) ensures that your tires aren’t causing any more resistance than necessary. Under-inflated tires generate more friction, reducing fuel economy and tire life.