But bias-ply construction limits a tire’s top speed. Once, all early tires were bias-ply tires: the steel bands that gave these tires structure overlapped at a 45-degree angle for maximum strength. Tire speed ratings have changed a lot over the years. The History of Tire Speed Rating Codes Michelin Performance Tires on a Bugatti Chiron | JIM WATSON/AFP via Getty Images Tire Speed Rating Chart Goodyear NASCAR Tire | Photo by Logan Riely/Getty Images Code Once you know your tire’s speed rating letter, you can look it up on our tire speed rating chart. When a tire is stamped “205/65R15/94V,” it has a speed rating of V.If a tire reads “225/65R17/102H” it has a speed rating of H.A tire with a size of “275/55R20/113T” has a speed rating of T.Your tire speed rating will be the final letter in your tire size. It should be three groupings of letters and numbers, separated by two slashes.
Tire speed rating chart how to#
How To Find Your Tires’ Speed Rating Pirelli Formula One Tire | Photo by Darren Heath/Getty Imagesįirst, locate your tire size stamped into each tire’s sidewall. Use our handy speed rating chart to find out the top speed of your tires. Unluckily, the speed rating is a code, a letter representing a given number of miles per hour. Luckily, every manufacturer stamps a tire’s top speed at the end of the tire size on the sidewall. Knowing your speed rating is important for proper maintenance. Therefore, tire manufacturers rate each model of tire for a top speed. At a high enough speed, any tire will blow out.
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