FAQ: What Does The First Number In A Tire Size Mean?

What do the 3 numbers mean on tire size?

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.

Are 225 and 235 tires interchangeable?

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

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.

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Can I use 60 instead of 65 tires?

Physically, yes they will fit. It is recommended to stay within 3% of the original tire size on the car though. The size you have is 3.09% smaller, so not recommended. You could go with 205/60-15 though if you can get a better deal on that size.

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.

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 235 55r17 instead of 225 65r17?

235 will fit width wise, if the rim is the correct offset. You will loose ~1.4″ in diameter going to the 55 though. Your speedo will be off.

Can I use 225 55r17 instead of 225 65r17?

The difference in the dimension of the two tyres is purely in the aspect ratio of the sidewall so the /65 tyres will have a bigger sidewall (note that the number is 65% of the width, not 65 somethings – i.e. 165.75mm vs 140.25mm and that’s effectively doubled because you’re taking radius, not diameter) and therefore

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Can different width tires fit on the same rim?

Wheels and tires are not interchangeable words. Tires are a part of the wheel setup. For instance, your vehicle has a set size of rims, but you can buy different sizes of tires to fit those rims, as long as the middle of the tires is the correct size.

What’s the difference between 285 and 265 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.

What is the difference between 225 and 265 tires?

Registered. Not quite that simple,, 225 and 265 are the width, but 75 or 70 is an aspect ratio of the width to the sidewall so a 225/75/16 is 29in tall, a 265/75/16 will be 31.5in tall, and 265/70/16 will be 30.5in tall. (width divide by 25.4 times aspect ratio divide by 100, times 2 plus rim diameter).

What’s the difference between 60 and 65 on tires?

The 65% aspect ratio (as in 235/65/17), compared to 60%, adds almost 12 mm (1/2″) to the radius of the tire (0.65-0.60)*(235mm)=11.75mm.

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Which tire is wider a 65 or 70?

The series number in a tire-numbering system refers to the aspect ratio of the tire’s sidewall height to its width. A series 65 tire’s height is 65 percent of its width, a series 70 tire’s height is 70 percent of its width and so on. These differences in height affect both performance and safety issues while driving.

What does 65 mean on a tire?

“65” in the sequence is the aspect ratio of the tire. The aspect ratio is a percentage, and it tells you the ratio of the tire’s height to its width. In this example, the aspect ratio number “65” means that the tire’s height is 65 percent of its width.

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