We've been helping people find the right tires, wheels and performance parts since 1979. If you're looking for the best and most accurate information on all things tires, you've come to the right place.
A tire's most important job is to carry the load required of it, and the load range/ply rating branded on the tire's sidewall indicates how much load the tire is designed to carry (at a specific pressure). Whenever changing tire sizes or from one tire type to another, it's important to ensure...
A load index is an assigned numerical value that signifies a tire's maximum load carrying capacity. They're useful to help compare load carrying capacity of different-sized tires, and as you might expect, the higher the tire's load index number, the greater its load carrying capacity. Using the...
Published: June 22, 2026 Walk through any autocross paddock, track-day event, or weekend cars-and-coffee gathering, and there's a good chance you'll spot a set of Toyo Proxes tires. Over the years, the Proxes name has become attached to everything from daily-driven sports cars and performance...
Published: June 17, 2026 When life gets busy in the spring, the last thing you want to do is take the time to swap out your winter tires for a set of proper all-season or summer tires. Tempting as that may be, can you just keep your snow tires on year-round to avoid the hassle and expense of...
Revised European Union (EU) labeling regulations for passenger car, light commercial vehicle and heavy bus/truck tires went into effect May 1, 2021. These revised regulations update and will replace those originally introduced in 2012 to further harmonize the information available when...
White wall, outlined white letter and raised white letter tires all share a common manufacturing technique of adding a layer of white rubber on a stylized sidewall, strategically covered by a thin layer of non-staining black rubber to create the desired letter, stripe or effect. The...
Four-wheel drive and all-wheel drive vehicles are equipped with differentials and/or viscous couplings that are designed to allow momentary differences in wheel speeds when the vehicle turns a corner or temporarily spins a tire. However, if the differentials or viscous couplings are forced to...
Advantages of Correct Tire InflationMaintaining correct tire inflation pressure helps optimize tire performance and fuel economy. Correct tire inflation pressure allows drivers to experience tire comfort, durability and performance designed to match the needs of their vehicles. Tire deflection...
While it is simple to place a Lincoln penny in the tread groove of a worn tire and use Abe's likeness as a guide, we don't think Honest Abe knows what's best for today's drivers. The Lincoln penny tread depth test has been touted for years to be a suitable method of determining when it's time...
While today's P-metric passenger tire sizes have existed since the early 1980s, restoring classic muscle cars and pony cars has kept yesterday's numeric and alpha numeric tires from disappearing. This chart has been developed to help you determine their equivalent Euro-metric and P-metric tire...
While most passenger car and truck tires follow a similar sizing convention, Light truck tires sometimes (especially in the larger off-road sizes) utilize flotation sizing, which can make comparing sizes somewhat less obvious. While the tire's spec page or tire size calculator will give...
Tire treadwear/mileage warranties have become a popular marketing tool used by most tire manufacturers (and some independent retailers) to help position some of their tires competitively in the marketplace and to help indicate their potential longevity to consumers. Today they range from 30,000...
Tread depth is a vertical measurement between the top of the tread rubber to the bottom of the tire's deepest grooves. In the United States, tread depth is measured in 32nds of an inch. Because it is difficult to accurately measure tread depth with a ruler, tread depth is best measured with a...
Sports cars are often described as vehicles that "stick to the road." Sports car tires make a major contribution to this phenomenon. These tires are very complex products meeting numerous, largely contradictory demands. Finding the proper structure that balances these demands for any given...
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