HomeTiresTire GuideCar Tire BasicsTire Speed Rating Tire Speed Ratings, Explained A Simple Explanation of Tire Speed Rating What Is Tire Speed Rating? A tire’s speed rating indicates the optimal speed that the tire can safely maintain over time. In short, it’s the fastest speed a tire can...
Speed Ratings are based on the fastest speed a tire can safety achieve and still perform as specified. A tires speed rating is based on lab settings with new and undamaged tires under controlled conditions. The letters A-Z correspond to a specific speed which can be easily referenced on the...
Some common speed ratings for tires include: H: 210 km/h (130 mph), common for passenger cars or sports cars S: 180 km/h (112 mph), common for sedans, minivans or light trucks T: 190 km/h (118 mph), common for sedans, minivans or light trucks Learn More About Tires Tire Type...
For example, the "W" rating seen in the image, tells us that this tire can reach speeds of up to 168mph. Speed ratings are based on tests in which engineers run the tire at 6.2 mph steps, in 10 minute increments, until the required speed has been met. Tire Sidewall Markings: Explana...
KEY: 1) Tire width; 2) Aspect ratio; 3) Radial-tire designation; 4) diameter; 5) Load rating with speed rating; 6) Heaviest spot on tire; 7) Tread-wear rating; 8-9) Traction and temperature ratings; 10-11) Mud-and-snow or three-peak-mountain rating; 12) Vehicle-specific marking;...
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The final letter (sometimes more than one) on your car tire’s sidewall indicates the tire speed rating. Similar to the load index, this is a reference code used to look up the actual recommendedtop speedin an index. Tires with higher speed ratings will perform better and provide more cont...
which included 10 very unique vehicles. The ride covered a varied terrain from very hot desert conditions to heavy snow in the Sierra Mountains," D'Andrade explained. "We ran the Firestone Destination M/T on our FlyFisher 110 and Hannibal SUVs, and of all the vehicles participating, the De...
A sure-fire way to ruin a steer tire is to overload it orrun it under-inflated, which are the same thing from the tire’s point of view. Tires do not respond well to under-inflation, so have your tire people do a survey of your trucks’ steer-axle weight ratings and compare it ...
• It is generally acceptable to apply a t rating than your original tires for use conditions; however, speed should b All winter tires should be the same sp Speed Ratings" in this manual. • Winter tires used in warm weather co more rapidly. • Studded winter tires follow the same...