Out Of Round

…balance related. The other primary cause of vibrations is that the tire and wheel assembly isn't perfectly round. Face it, if we go out far enough past the decimal point, nothing is perfectly round. This includes your wheels and tires. The problem is when the high spot on the tire, and the high spot…

…a ride disturbance that will be felt for the first few miles the next time the vehicle is driven. Flat-spotting can be temporary (the tire will round out as driving warms it up) or in the most severe cases, permanent (in which the tire's ride quality is effectively destroyed). A flat-spot's severity…

…wheel or through seats/floor? Tires Do the wheels and tires run true? Now do the wheels and tires run true? Does wheel and tire balance check out? Did this eliminate tire vibration? Did vibration location change? Did vibration location change? Continue with Wheel diagnosis chart. Do the wheels…

…combined uniformity. This simulated road force test helps verify if the assembly is "round" when rolling under load. The GSP9700 Vibration Control System can also measure lateral and radial rim runout (out of roundness or side-to-side movement) to identify and separate wheel runout from tire runout.…

…potholes and ruts in the roads, which are causing many drivers to experience problems with their tires, like sidewall bubbles. If you can see a round bulging area protruding on the sidewall of the tire, this is often referred to as a bubble. The bubble is appearing because air from inside the tire…

…are typically backed by their manufacturer's limited warranties for a period of 4 to 6 years from the date of purchase or until the tread wears out, whichever occurs first. All tires sold by Tire Rack (except race and rally tires) have a manufacturers' limited warranty extended to the original…

…combined uniformity. This simulated road force test helps verify if the assembly is "round" when rolling under load. The GSP9700 Vibration Control System can also measure lateral and radial rim runout (out of roundness or side-to-side movement) to identify and separate wheel runout from tire runout.…

…blend of ride quality, noise comfort, treadwear, handling and year-round traction, even in light snow. While Original Equipment All-Season tires are often repurchased as direct replacements for pairs and sets of worn out Original Equipment tires, they can also be used on other vehicles in axle ...

…enhance wet traction. The EP422 also comes with a 5-year, 65,000-mile treadlife warranty for added peace of mind. The Dueler H/L 422 Ecopia rounds out the family with all-season capability for SUVs and even some light truck applications. Our most recent test using Porsche Cayennes as test vehicles…

…wintertime traction, you'll want to pick the ones that fulfill their all-season promise. Note: All tires require sufficient tread depth to provide traction in deep, powder snow. As all-season tires wear down, they will eventually be reduced to nibbling at snow rather than taking a bite out of it.

…one tire to do it all, and it needs to perform during the summer, as well as cope with winter weather. To find out if the newest tires are single-focus specialists or more well rounded athletes, we went to Sweden...where winter reigns supreme. Read the Full Test Report View Road Manners & Dry/Wet…