How read tire size?

What do tire size numbers mean?

The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire’s width. The bigger the aspect ratio, the bigger the tire’s sidewall will be.

What does the 265 70R17 mean?

On this page you’ll find a color-coded explanation of the 265-70R17 tire code. This number means that your tire has an aspect ratio of 70%. In other words, your tire’s sidewall height (from the edge of the rim to the tire’s tread) is 70% of the width. In this case, the sidewall height works out to be 185 millimeters.

How do you read tire sizes?

Thus, a tire with the measurement “P225” is for a passenger vehicle and has a nominal width of 225 millimeters. After the slash mark, the next number you see is for the tire’s aspect ratio, which essentially tells you how tall your tire’s profile is: P225/70R16 91S. Aspect ratios are delivered in percentages.

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. … The bigger the aspect ratio, the higher/taller the tire’s sidewall, or “profile” as it’s sometimes called. The aspect ratio is indicated on the tire sidewall as a percentage.

Can I use 235 tires instead of 225?

01. Are 225 and 235 Tires Interchangeable? Yes, they are. However, this is only possible if your car’s rims can accept the larger millimeter.

Can I use 225 tires instead of 215?

Yes, you can. But only if the rims on your car can accommodate tires that are 10-20 millimeters wider. Bear in mind that wider wheels require more fuel due to their increased rolling resistance. Again, wider tires are more costly than narrower ones because they need more rubber during construction.

What’s the difference between 265 and 285 tires?

The larger 285/70R17 tire in the photo above stands over an inch taller and is nearly an inch wider than the 265/70R17 size. … The width of the tread is also a half-inch wider. Many late-model domestic trucks accept this difference in size.

How much wider is a 275 tire than a 265?

Going from 265/70/17 to 275/70/17 isn’t a big deal. Depending on the specific dimensions of the tire, the only difference will be 0.4″ wider and 0.6″ taller per tire. The biggest difference is going to be going from a passenger rated tire to a light truck tire.

How tall is a 315 70R17 tire?

What does the R mean in tire size?

R indicates the construction used within the tires casing. R stands for radial construction. B means belted bias and D stands for diagonal bias construction. 17 The last dimension listed in the size is the diameter of the wheel rim, which is most often measured in inches.

Are wider tires better?

Larger tires improve handling and cornering, due to wider tread faces and stiffer sidewalls. … Wider tires may also increase acceleration, especially in very powerful vehicles such as muscle cars. Larger wheels with lower profile tires are sometimes aesthetically desirable.

Can I use 245 tires instead of 235?

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.