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TIRE CONVERSIONS AND LOAD RATINGS. SPEED SYMBOLS. The speed symbol determines the maximum speed allowed for the rated loads of the tire. From the table above, A8 means the maximum speed allowed for the rated load of the tire is 40 km/h or 25 mph. Titan Tire Corporation • 2345 East Market Street • Des Moines, Iowa 50317.
Tire load index, load ratings and load x speed rating chart. Get the guide to understanding tire load index (free) with illustrations and a downloadable chart.
You can use the chart below to convert these ratings into the actual maximum speed your tire is rated for. Tire speed rating chart. Using the chart, we can see the tire is rated to withstand sustained speeds of up to 149 miles per hour.
The tire speed rating indicates the maximum speed at which a tire can carry its maximum load. On the sidewall of your tire (or the sticker in the driver's door, or the owner’s manual), the speed rating is defined by a letter right next to the load rating. Here, the tire speed rating is V.
See the chart below for the full list of speed ratings and their applicable values. In all instances the tyres load and speed rating must meet or exceed the vehicles placard.
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 handle before it no longer performs as designed. The higher the speed rating, the better control and handling you’ll have at higher speeds.
How to find tire load index. While you’re probably unlikely to approach the top speed rating of your tires, pushing load index ratings is more common, especially when it comes to hauling and towing with trucks and SUVs. Use the chart below to understand the weight limitations of your vehicle’s tires.
