What do the 3 numbers mean on tire size?

B: TIRE WIDTH The three-digit number following the letter is the tire's width (from side to side, looking at the tire head on) in millimeters. This may also be referred to as the section width. C: ASPECT RATIO The forward slash separates the tire width number from the two-digit aspect ratio.

What do the 3 sets of numbers on a tire mean?

The numbers are indicators of the size, type, and performance of the tire. Enter your information to see the tires that fit your vehicle.

What are the first 3 numbers of a tire size?

The three numbers on tire size represent the width, the height, and the diameter of the tire, respectively. The width is measured in millimeters and indicates how wide the tire is from side to side. The height is measured in a height-to-width ratio.

How do you read a tire code?

What numbers matter when buying tires?

Treadwear Grade

Treadwear is the easiest to decipher as it is a three-digit number that indicates how long tread on the tire will last relative to other tires. In theory and in similar conditions, a tire with a 300 treadwear rating will last three times as long as one with a 100 rating, and so on.

How to Read a Tire Size

Can I use 235 tires instead of 245?

The quick answer is yes you can replace 245/50-18 tyres with 235/50-18 but they will have 10mm (0.4 in) smaller overall diameter. Will only slightly effect speedo and odometer - ie speedo will read about 1.5% high.

Can I use 205 60r16 instead of 205 55r16?

Yes. It will have a slightly lower sidewall height, but should work fine.

What do tire codes mean?

Automotive tires are described by an alphanumeric tire code (in North American English) or tyre code (in Commonwealth English), which is generally molded into the sidewall of the tire. This code specifies the dimensions of the tire, and some of its key limitations, such as load-bearing ability, and maximum speed.

What is the difference in a 70 and 75 tire?

The difference will be in the height. The sidewall of a 70-series tire will be 70% of the width, a 75 series will be 75% of the width. If you want the same HEIGHT in a 70 series, then you need to go wider in the width -- about 219.

What's better load range D or E?

Expert Reply: Load range D has a capacity of 1,220 lbs at 65 psi, whereas load range E has a capacity of 1,520 lbs at 80 psi. Basically the only difference between the two is the weight capacity.

What's the best speed rating for tires?

As manufacturers developed bigger and better tires, it became necessary to regulate performance at standardized speeds to ensure safety. The "Limited V" category of 250 km/h (149 mph) was then created, and eventually the "Z" speed rating was added as the top speed rating.

Do tire sizes need to be exact?

Width and diameter are the two factors that determine tire and rim compatibility. For diameter you'll need to be sure that your tires and wheels are an exact match, e.g. a 215/65R17 tire will only fit on a 17" diameter wheel.

What's the difference between a 205 tire and a 215 tire?

The Quick Answer

Using 215 mm tires instead of 205 mm tires will result in better traction in dry conditions which helps to improve acceleration. However, 205 mm tires are less prone to aquaplaning and result in better fuel economy and less road noise compared to 215 mm tires. Narrower tires are also less expensive.

Are 215 and 205 tires interchangeable?

Physically they should fit on the rim and tire without issue. The difference is going to be the rolling distance is a bit shorter for the new (to you) tires. 215 to 205 is 1cm difference in width.

Can you change tire size without changing rims?

It's possible to change the size of your tires without actually changing the diameter. One example is if you want larger rims - you can buy tires that compensate for the larger rims by reducing the "height" of the outer tire.

Can you replace 225 tires with 235?

No, not OK... all tires should be same diameter. the diameter is the same just more contact with the ground. uh... 225/45/17 and 235/45/17 are NOT the same rolling diameter.

Can I use a different tire width?

As a general rule of thumb, it's safe to fit a tire up to 20 millimeters wider than stock on the original rim. The actual width of the tire will vary depending on the width of the rim: The tire will expand 5 millimeters for every half inch (12.5 millimeters) increase in rim width.

Are 205 and 225 tires interchangeable?

Expert Reply: You can certainly change your trailer tires to a narrower 205mm width as long as your wheels are 6- or 6-1/2-inches in width. These are the only size wheels that can take both 225mm and 205mm tire sizes.

Can wrong size tires damage transmission?

Increasing Tire or Rim Size Can Cause Premature Wear

If you are running an automotive transmission this can cause some serious strain depending on the current gear ratio if you choose not to re-gear your system.

What tire size is bigger 215 or 225?

215 and 225 are the tire widths measured in millimeters. That said, 225 is wider than 215, however, in terms of aspect ratio, the latter has a higher profile. These two tire sizes also serve a specific purpose depending on general usage.

Can I use 235 tires instead of 215?

215 and 235 tires are interchangeable if they come with the same tire aspect ratio and the same rim diameter.

Are 265 and 245 tires interchangeable?

The 245 35 R17 tire has a width of 245 mm, a height that is 35% of 245 mm (85.75 mm), and it is compatible with a 17-inch diameter rim. The 265 40 R17 tire has a width of 265 mm, a height that is 40% of 265 mm (106 mm), and it is compatible with a 17-inch diameter rim.

Can you run two different size tires on the same axle?

Having two different-sized tires on the same axle is generally not a good thing. If the diameter of the two tires is close, then the rolling radius is about the same, so in the short term, you probably won't have any damage, but long term, you run the risk of messing up your car's differential.

What does R mean on a tire?

“R” stands for the construction method of the tire indicating the tire is a radial tire. The following two numbers (16) indicate the diameter of the wheel rim in inches. The next two or three numbers (94) indicate the load index of the tire. In the example, 94 means the tire can carry 670kg.

Should I get H or V rated tires?

If you feel the need to drive at or above 130 mph then you should get a “V” speed rated set of tires. If you don't plan on driving that fast, then an “H” speed rated set is the better option.