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View Here : What Do The Numbers On Tires Mean

Aspect ratio of sidewall (Example: P225/ 45 R17 91V) The two-digit number that usually follows the tire's section width tells us the aspect ratio, or tire profile measurement. In this example, the 45 indicates that the sidewall distance, from the wheel rim to the outside of the tread, is 45% of the section width.

Speed ratings range from L (75 mph) to Y (186 mph). The tires on the vehicle above have a speed rating of H, so they are certified to handle speeds of up to 130 mph. Just because a vehicle’s tires are rated at a certain speed does not necessarily mean that the car is capable of safely reaching that velocity.

(65) Aspect Ratio. This number is the tire's aspect ratio, or its section height compared to its section width. In this example, the section (or sidewall) height is 65 percent of the section width. This number can be indicative of a tire's purpose.

Tire Width. Is the width of the tire measured in millimeters from sidewall to sidewall. The first three-digit number in the tire size refers to the tire width. For instance, in a size P215/65 R15 tire, the width is 215 millimeters.

What do the numbers mean on the sidewall of your tire? At first glance, you look at your tire sidewall and think, “’Do I need a super secret decoder ring to read this?” In addition to the model name of the tire there is a series of numbers that at first, you don’t deem important.

Aspect Ratio. So, 55 profile is 55% of the width, meaning the tire’s height is (taking the width of 205 mm) 112.75 mm or 4.4”. You may see tires without these tire numbers, meaning the tire’s profile is standard – 82%. Also, there are rarely tires with the ratio of three digits, which means it’s in millimeters.

How to Tell What Numbers Mean on ATV Tires ... Some numbers on ATV tires will have an "R" between the second and third number. The "R" simply means radial construction. ... you can also find your tire size under specifications in your owner's manual. There are also several ATV sites online that list tire sizes once you find your ATV model.

Going back to our Audi, the H speed rating is equal to 130 miles per hour, meaning that under optimal conditions, the tire can perform at speeds up to 130 mph. Now just a second, leadfoot … that doesn’t mean you should drive 130 mph. It means the Audi A3 is capable of a top speed of 130 – but here in the U.S.,...

The 50 indicates that this tire size's sidewall height (from rim to tread) is 50% of its section width. The measurement is the tire's section height, and also referred to as the tire's series, profile or aspect ratio. The higher the number, the taller the sidewall; the lower the number, the lower the sidewall.

Flotation sizes. If a tire size has three sets of numbers (15x6.00-6, 26x12.00-12, 31x15.50-15), then the first number ( 26 x12.00-12) is the approximate height in inches, the second number (26x 12.00 -12) is the approximate width in inches, and the third number (26x12.00- 12) is the rim diameter in inches.