# Quick Answer: How To Size Car Tires?

## How do I know what size tires to get for my car?

1. 1) The width of the tires in millimeters.
2. 2) Percentage height of the sidewall in relation to the width.
4. 4) Rim diameter in inches.
5. 5) Load index (the maximum load capacity of the tire )
6. 6) Speed index (the maximum speed of the tire )
7. 7) Self-Supporting Run-flat tire.

## 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. It’s the height of the sidewall measured from wheel rim to top of the tread, expressed as a percentage of tire width. In other words, it’s sidewall height divided by tire width.

## Can you put any size tire on a car?

It’s possible to change the size of your tires without actually changing the diameter. Generally, you don’t want to go with tires that have a diameter that is more than 3% different from the factory tires. It’s also a good idea to consult with a trusted mechanic before switching to larger or smaller tires.

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## Can I use 70 instead of 65 tires?

The higher the aspect ratio number, the taller the tire will be. Both 65 and 70 series tires can be categorized as all-season passenger tires, which generally have aspect ratios between 65 and 80, but a series 65 tire will give better response while a series 70 tire will offer a better, more comfortable ride.

## How do I pick a good tire?

For mainly road or highway driving, look for:

1. Braking distance at high speed: For maximum safety, select tires that provide optimum braking distance on both dry and wet roads.
2. Comfort: For long trips, choose tires that offer comfort both in terms of vibration and noise level.

## Can wrong size tires damage car?

Unfortunately, altering the tire size of a vehicle without thorough and careful consideration is a decision that can really bite. Fitting the wrong tire size can cause damage to a vehicle, and is a real safety hazard as well.

## Can I use 235 tires instead of 225?

Yesthat size will work 100% perfectly, as it is the exact same diameter as the 225 /75-16. 235 /70-16 is actually a shorter tire.

## Can I use 215 tires instead of 205?

Nope. The nominal diameter of the 215’s is 1.7% greater than that of the 205’s. The sidewall height is a percentage of the width of the tire, so a 55 series is taller with a wider tire.

## Are wider tires better?

From a safety point of view, both types have their good sides: On a dry road, wider tires will offer more grip than narrow ones, but the risk of aquaplaning will be higher with wide tires. – In the winter, narrow tires are better under extreme conditions as they provide higher surface pressure against the road.

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## What happens if you put different size tires on a car?

If you choose to drive your vehicle with mismatched wheels the same issues can result. Mismatched wheels will fit each tire differently causing uneven wear and tear. In addition, different sized wheels can lead to different sized tires which can be detrimental to your vehicle.

## Can I use 205 tires instead of 225?

Short answer, it will be fine. Long answer, it will be fine as long as the load rating is equal or higher capacity. Not many high load rated tires in those sizes, so probably ok. Tire sizes are metric, and are read as follows: 205 (tread width in mm)/65(side wall ratio, so 65% of tread width)R15(rim 15 inch diameter).

## What happens if you put bigger tires on your car?

Larger wheel diameters can result in faster and more composed handling; however, it can also result in slower acceleration capability. While there are a few disadvantages for any vehicle when increasing the wheel and/or tire size, curb appeal usually outweighs them.

## What tire is wider 70 or 75?

The width of an R70 and an R75 should be the same — in this case 205 millimeters — about 8 inches. 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.

## What does the 65 mean on a tire?

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.

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## Are 255 and 265 tires interchangeable?

There isn’t much difference between the 255 and 265, but if I’m going to replace them a little wider and a little taller is the way to go.