265/65R17 Vs 265/70R17 Tire Size: What Are The Differences?

A lot of motorists do not have any idea about what the tire size index is. And that is pretty normal! 

The tire size indicator is not that easy to comprehend. For that reason, people often fail to understand the difference between one tire and another. Take 265 65R17 and 265 70R17, for example.

Basically, you need to consider some things regarding 265/65R17 Vs 265/70R17 tire size. Furthermore, you should understand what each of the terms on the index really stands for. 

Therefore, let’s not waste any more of your time and describe all the things you need to know regarding the topic.

265/65R17 Vs 265/70R17 Tire Size

What Do The Terms Mean?

So, when it comes to 265 65r17 vs 265 70r17, you first need to get a proper idea about the terms. And in case it was not clear, there are four different pieces of information in the index. They are:

  • 265: This indicates the tire width in meters
  • 70 or 65: This number states the aspect ratio of height/width
  • R: Both the 265 65R17 and 265 70R17 have the letter R in them. This letter describes the construction type of the tires. In this case, both tires are radial.
  • 17: The last number, which is 17, indicates the diameter of the rim. It is in inches. So, for both tires, the rim diameter is 17 inches.

What Is The Difference Between 265 70r17 and 265 65r17?

In case you did not know, the 265 70R17 is an updated version of the 265 65R75. Now, the real question is, what made the 70R17 get that status? Well, these are the reasons why:

Overall Diameter

Compared to the 265 70R17 tire, which has an overall diameter of 31.6 inches, the 265 65R17 diameter stands at 30.6 inches. Although the difference is just 1-inch, this small difference makes up for another large difference between the tires. What is that? 

The overall tire diameter will sum up the diameter of the wheel and sidewall height of the tire. In other words, a slight difference between the overall diameter can impact the overall fit of the tires.

However, that is not all! It is not just about the height; the diameter of the wheel will translate to how heavy the tire is. 

For example, a wheel with a comparatively higher diameter will be heavier in comparison. And as you might know, the tire’s weight can affect the vehicle’s speed.

In short, the 265 70R17 has a large wheel diameter and sidewall height than the 265 65R17. So, that means that the 265 70R17 is a bit heavier than the 265 65R17.


Each car will come with a specific car computer. The manufacturer will program that computer by considering the tire sizes that are affixed to that specific vehicle. 

And the circumference of the tire can change a couple of things that the computer relies on. For example, the current speed and the distance of the travel.

So, what do these mean? Well, your speedometer might not offer you correct information if you are rocking a tire the computer is not supposed to handle. 

Nonetheless, in terms of the 265 70R17 and 265 65R17, the 265 70R17 has a 99.3 inches circumference, whereas the 265 65R17 has a circumference of 96 inches. The difference between the two is 3.3 inches, which translates to a 3.4 percent difference. 

Now, whether this difference will make any impact or not on the car will depend on the computer.

Revolution Per Mile

For the 265 70R17, the revolutions per mile are at 638.1. In comparison, the 265 65R17 stands at 659.9 revolutions per mile. So, the difference in terms of revolutions per mile is 31.8 revolutions, which is about 3.3 percent.

Now, when it comes to what the impact will be, the vehicle’s fuel efficiency will be different with each tire. 

Generally, tires that feature lower miles per revolution will provide better fuel efficiency. That means that the 265 70R17 will perform better in terms of fuel efficiency.

Sidewall Height

The difference that lies between the 265 70R17 and 265 65R17 in terms of the sidewall height is 0.5 inches. That represents a difference of about 7.7 percent. 

Generally, a taller sidewall provides a smoother overall ride. It also reduces the possibility of the wheel flexing too much when hitting a curb or pothole.

So, again, the 265 70R17 is the winner!

What Are The Similarities Between The 265 70R17 and 265 65R17?

It is not only about the differences. There are some similarities between the two tires, which you should definitely know!

Section Width

So, what is all the fuss about the section width of the tires? Well, the tire width will have a direct impact on the price of the tires. But that is not the only factor the width will have an influence on. There are other factors as well. That includes the noise level, grip, overall comfort while driving, and the outlooks of the tires.

But the good news is that the 265 70R17 and 265 65R17 are 10.4 inches in section width. That means you can expect them to perform pretty much the same on the factors that I have mentioned above.

Construction Type

Both the 265 70R17 and 265 65R17 are radial tires. This type of tire provides superior performance in terms of traction. However, they are not a suitable pick for off-road adventures. And the story is the same for both the tires highlighted here.

Wheel Size

Another similarity between the 265 70R17 and 265 65R17 is the wheel size. They are both 17 inches. So, both will excel in terms of providing a quiet and comfortable ride.

Final Words

So, what is the conclusion regarding the topic of 265/65R17 Vs 265/70R17 tire size? Well, the 265/70R17 is truly an upgrade to the 265 65R17. And if you are asking yourself the question of can I use 265 70r17 instead of 265 65r17, you can and should! But do check whether your vehicle is compatible with the tire or not!