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...
The table below suggests tire inflation pressures for competitive driving. Tires should be reset to normal inflation pressures when returned to the street. These recommendations should be used as a starting point. Pressure can be adjusted to match the driver's preferences. Adjust pressure in 2...
"Check and adjust first thing in the morning...before rising ambient temperatures, the sun's radiant heat or even driving short distances temporarily warms the tires." Maintenance Tips to Increase Tire Performance, Life and DurabilityCheck and Adjust First Thing In The Morning. Set according to...
One of a tire's primary tasks is to carry the weight of the vehicle. But anyone who's ever had a flat tire knows that the tire doesn't really carry the load...the inflation pressure inside it does! Using the correct inflation pressureinflation pressure not only provides the appropriate load...
Sidewall Indentations / UndulationsFig. A: Vertical indentation on sidewall from rim to tread. A common byproduct of radial tire construction, sidewall indentations/undulations are more noticeable in tires with taller sidewalls or operate at higher inflation pressures. Fortunately sidewall...
For handling-oriented track & competition fitments, Tire Rack recommends mounting tires on the widest rim width approved by the tire manufacturer (and permitted by competition class rules). However, we also recognize that rules for stock, spec, or other autocross/racing classes often restrict...
How do M+S (Mud and Snow) branded tires, All-Season tires, and three-peak mountain snowflakeAll-Season tires, and three-peak mountain snowflake branded tires differ in the snow? One word; Traction! And while you may not know which tire offers the best traction in winter weather, it'll only take...
Maximum Inflation PressureA tire's maximum inflation pressure is the highest "cold" inflation pressure that the tire is designed to contain. However the tire's maximum inflation pressure should only be used when called for on the vehicle's tire placard or in the vehicle's owners manual. It is...
Run-flat tires offer drivers temporary extended mobility even after a puncture allows complete air pressure loss. However, even run-flat tires will fail if driven too fast, too far or too heavily loaded when flat. For this reason, run-flat tires may only be used on vehicles equipped with a Tire...
Most run-flat tires make a promise of temporary extended mobility at up to 50 miles per hour speeds for up to 50-mile distances in the event a puncture allows complete air pressure loss. However, even if driven within their speed and distance limitations, driving on run-flat tires with low or...
Maximum LoadA tire's maximum load is the most weight the tire is designed to carry. Since a tire's load carrying capacity is related to the tire's size and construction and how much inflation pressure is actually used, maximum loads are rated with the tire inflated to an industry assigned...
Federal law requires tire manufacturers to provide standardized information permanently branded on the sidewalls of all tires sold in the United States. This includes information about the tire's basic characteristics, capacities and construction, as well as its U.S. Department of...
The answer could be yes, no, or yes and no! It all depends on your vehicle's tire type, setup, and whether you are replacing just two or all four tires. Are your tires directional, or non-directional? Are they mounted in a "square" setup, i.e., all four tires are the same size? Or "staggered,"...
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