235 Vs. 255 Tires (Difference And Are They Interchangeable?)

This article talks about the differences between 235 and 255 tires. We will also discuss if you can interchange 235 tires with 255 tires. The tire of a vehicle is one of the most misunderstood parts of an automobile. 

Many car drivers still do not know its correct pressure, when worn out, their formats, their rotation schedule, and many more. Many tires are, but this article will focus on the 235 and 255 tires. This is because people are still confused about lots of tires. 

And people would ask about the difference between 235 tires and 255 tires. Tires are a part of a vehicle, and tires play a vital role in automobiles. Tires are also evolving. 

The first tire that was made was evolved, and there are many changes and improvements to making the perfect tire. So if you have the same question, this article is right for you. Let us get started. 

235 Vs. 255 Tires

What Is The Difference Between 235 And 255 Tires?

The 235 means that it is the width of the tire from the sidewall and into the sidewall, and they are in millimeters. So the 235 tires are 235 millimeters, and it is 9.25 inches wide from the sidewall to sidewall. 

The 55 grouping is the aspect ratio, and it is one of the most confusing and misunderstood dimensions. The 255 or the tire width is 255 millimeters from sidewall to sidewall, and it is over ten inches. 

The sidewall of the tire is 45% of the width of the tire, and it means that the sidewall is about 114 millimeters or just over 4 inches. 

How Much Bigger Is A 235 Tire Than A 255?

The differences and how significant it is 235 and 255 are that the 225 tires are 225 millimeters in width. And on the other hand, the 235 tires have a width of 235 millimeters. 

Are 235 And 255 Tires Interchangeable?

Yes, you can interchange 235 tires with 255 tires. The specification is that the 235 tires and the 255 tires can be interchanged as long as they have an aspect ratio of seventy percent and a diameter of sixteen. So they are different in terms of the width size, but you can switch them.

Can I Replace 255 Tires With 235?

The vehicles will need to be maintained regularly, and they must be replaced. Both of these tires are durable and can handle their respective types of vehicles. So the 255 and 235 tires are not compatible with the exact vehicle. 

Can I Replace 235 Tires With 255?

Yes, it will fit people who say that you have to check the speedometer and the odometer. You have to check first the diameter of each tire. 

You need to see how much it can throw off your speedometer, and anything else will depend on the registered speed. The second thing that you have to check is the load-bearing weight. 

What Does The Number On A Tire Mean?

Each group of the number represents one dimension—the 255 groups indicating the tire’s width from sidewall to sidewall in millimeters.  The 235 grouping is the aspect ratio and is one misunderstood dimension. 

It is the height of the sidewall from the wheel tread relative to the width. They’re a lot of things to be considered with tires. 

First, all the numbers will change with the size of the tire. It is the height of the sidewall to wheel to tread relative to the width. 

The manufacturer will represent this measurement in a percentage. If you look at the tire’s sidewall, you will notice two main things. 

This is the brand name and the size. The size has some formats, but you can easily find them. 

It reads something to the effect of 235 P235/55R18, 235/55R18. You can find there the recommended size for your vehicle from the manufacturer.


In summary, people ask about the sizes of the tires. As a car driver, you should know the basics of what the number on the tire means. 

With that, this article will serve as a guide for you. Every number on the tire size has their meanings.



Image credits – Canva

Share on:

My name is Hank, and I've been in the automotive industry for 27 years. I've been working in my own auto repair shop for the last 13 years, and now I want to help you here, on my blog. Let me know if you have any questions. Read more