High Mileage Tires - Test Results on the Toyota Prius

The Tire Rack recently tested six environmentally friendly tires designed for low rolling resistance for higher miles per gallon vs. the original tire equipped on the Toyota Prius. The results were surprising and quite promising. See the report here, "When Round and Black Becomes Lean and Green"

It was always an interesting dilemma regarding tires and how they perform. Get more tread life from your tires and sacrifice performance or emergency maneuver capability (braking distance) due to hard compounds. Achieve better performance and suffer from faster tire wear and higher cost of ownership.

I never understood why low rolling resistance tires would wear out quickly. The assumption was always a hard tire would have less rolling resistance and therefore would last longer. Instead, as explained by Matt Edmonds, Vice President of Marketing at The Tire Rack, the low rolling resistance tires in the past would "give themselves up" to the road, hence wearing faster. But due to advances in tire compound technology and tread design, this is no longer the case. These modern tires now show advantages over the same model that comes on the car, in this case a Toyota Prius, from the factory. Check out the Test Result Charts here.

An interesting observation is that the original Goodyear Integrity tires perform the best in the dry, but not by a large margin. However, they were rather poor in the wet. Especially in wet braking distance, inexcusably worse than the rest. Of course, when the tire was first introduced, it may have been the ideal choice for cost and performance.

Tread wear would be the final aspect that a 550 mile test loop cannot show. However, looking in the "warranty" link for each tire, most have very good tread life warranties. Contrast that with more expensive (albeit larger/wider) high performance tires that last 20,000 miles if you're lucky. and the appeal of lower operating costs and less waste looks very attractive. One thing about all-season tires, they don't react negatively to cold temperatures like high performance tires. Here is my idea for a tread temperature measurement feature.

Take a look at the test results and you'll see not all tires are created equal. The variance is not just the tread pattern. The Tire Rack is an excellent resource for information including tires and equipment. Even if you don't buy from them, when shopping for new tires many retail outlets will have a price matching policy to within a certain amount so you always know you're getting a good deal.

Now when shopping for tires for your daily-driver, a low rolling resistant tire is no longer a compromise in safety or tread life. As technology advances with a continued emphasis on safety and miles per gallon, tires continue to be another avenue of improvement as well.

Got a question about cars you would like answered? Performance, racing, modifying, shopping, makes, models, events, etc? Ask me here: AskRobAboutCars@gmail.com and I'll do my best to answer your question and publish it here on Examiner.com!