What does the first number on a tire mean?

Width. The first number to appear in your tire size information is the width, in millimeters, of the correct tires for your vehicle: P225/70R16 91S. Tire width always refers to the measurement from one sidewall to another.

What do the numbers on the tires mean?

The first two digits represent the manufacture week and the second two represent the manufacture year. In the example above, the DOT Number has a date code of 4515, which means the manufacturer built it on the 45th week of 2015.

What does the first number on the tire label indicate?

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 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.

What do the first two numbers on a tire mean?

The first number measures the width and it looks something like this: [205/65 R 15]. The 205 on the tire means it is 205 millimeters wide looking at the tire head on. The second number, 65, is the aspect ratio, which means that the height of the tire is 65% of the tire's width for this example.

What Do Tire Numbers Mean - How To Read Tire Numbers

Can I use 215 tires instead of 205?

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 I use 205 60r16 instead of 205 55r16?

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

What's the difference between 225 and 245 tires?

A 245 tire is approximately 10mm higher than a 225 tire. This also means that a wider tire is also going to increase your car's ride height. This is because wider tires tend to have a higher aspect ratio which essentially means that they are not only wider but also taller as opposed to narrower tires.

Can I use tires with different width?

While it's fine to put narrower tyres on the front and wider on the back, it's pointless to put wider tyres on just one side of the car. This would change the weight balance and would mean one side of the vehicle would grip differently to the road when braking. It would change the cornering dynamic, too.

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.

Can you change tire size 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.

How much difference in tire size is acceptable?

When changing tire sizes, we recommend staying within 3% of the diameter/height of the original tire. Any more than this and you face the risk of brake failure.

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.

Can I use 175 tires instead of 185?

That is the size you would ideally want to stay with. Both a 175/80-13 and 185/80-13 will fit the same size wheels (4-1/2 to 5-1/2 inch wide) and they are about the same diameter (between 24 and 24-1/2 inches). The major difference is the capacity. A 175 tops out at 1,610 pounds for a load range D, # AM10210.

Can I use 255 tires instead of 265?

255 is a better fit for the 8.5" width rather than the 265. For those who like to ride on TOP!

Can I change my 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.

Are 17 or 18 inch wheels better?

The Quick Answer

Smaller 18″ alloys will have tires with a lower profile compared to the smaller 17″ alloys. The benefits of the 18″ alloys are that they result in sharper handling and look more aesthetically pleasing, however, the 17″ alloys are more comfortable, quieter and cheaper in comparison.

Can I use 205 tires instead of 225?

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 225 tires replace 255?

then yes 225 will fit, lokks a bit streached but fits ok. Tyre manufacturers will give a rim width guide for tyre fitment anyway. The 225 or 255 is the width in mm.

Can I use 245 65r17 instead of 225 65r17?

Best Answer. the tires are a whole inch bigger in diameter, which is out of range I would not change. Stick with the tires size that dodge recommends on the door jam.

Do wider tires make a difference?

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.

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?

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.

Does the tire aspect ratio matter?

The aspect ratio affects steering stability. Generally, the shorter the sidewall, or the lower the aspect ratio, the less time it takes to relay the steering input from the wheel to the tire, for faster steering response. Aspect ratio also affects the tread contact patch.