Difference Between 265/65 and 265/70 Tires

Understanding tire size can be tricky and many users find trouble comprehending it.

Aspect ratio is the main difference between 265/65 and 265/70 tires. The aspect ratio of 265/65 tires is 65%, whereas 265/70 tires have 70% aspect ratio.

So, there is a 5% aspect ratio difference between the two tires.

There are also a few other noticeable differences between them that users should know about.

I have discussed 6 diffferences between the 265/65 and 265/70 tires to help you choose the suitable fit for your vehicle.

What Does Tire Aspect Ratio Mean

what does tire aspect ratio mean

The ratio of sidewall height and tread width is defined as the aspect ratio of a tire. Sidewall height is also denoted as the tire height. It is then multiplied by 100 which gives us a natural number.

Tire codes have different parts associated with the different build measurements. 265/65 tire’s aspect ratio rating is 65 which means the sidewall height is 65% of the tread width. On the other hand, 265/70 tire’s aspect ratio of 70 means the sidewall height is 70% of the tire width.

265/65 and 265/70 tires have the same width of 10.43 inches. Sidewall height readings of the tires are 6.78 inches and 7.3 inches respectively.

A higher aspect ratio represents higher sidewall height and a lower aspect ratio indicates lower sidewall height. Tires with higher sidewall heights are better for offroading and provide better handling in uneven terrains.

What Is the Difference Between 265/65 And 265/70 Tires

The general difference between 265/65 and 265/70 tires is in the tire aspect ratio. Other noticeable differences are in overall diameter, circumference, sidewall height and revolution per mile. These differences lead to different user experiences.

Here is a table containing the basic comparison between 265/70 and 265/65 tires:

Parameters

265/65 265/70

Difference

Build Type

Radial Radial

None

Overall Diameter

30.6 inches 31.6 inches

+1 inch

(3.27%)

Radius

15.28 inches 15.8 inches

+0.52 inches

(3.4%)

Tread width

10.43 inches 10.43 inches

None

Sidewall

6.78 inches 7.3 inches

+0.52 inches

(7.67%)

Circum

96 inches 99.3 inches

+3.3 inches

(3.44%)

Revs per mile

659 RPM 638 RPM

-21 RPM

(3.19%)

1. Overall Diameter

Overall diameter

Overall diameter of 265/65 tires is 30.6 inches. On the other hand, 265/70 tires are 31.6 inches in diameter.

There is only an inch diameter difference between the two tires. It may not look much but 265/70 tires have 3.27% larger diameter than 265/65 tires.

Bigger tires tend to be heavy which affects stability, control, fuel economy and riding comfort.

Also, the difference is more than 3% which is not suitable for tire exchange. So, replacing a 265/65 tire with a 265/70 tire may lead to instability and safety issues.

2. Sidewall Height

Sidewall height of the 265/65 tire is 6.78 inches. On the other side, 265/70 tires have 7.3 inches of sidewall height.

They have 0.52 inches sidewall height difference which is equal to 7.67%. So, 265/70 tires have 7.67% more sidewall of tire height than 265/65 tires.

Increasing the sidewall doesn’t greatly affect the driving experience. But increased tire height will assist you drive better in diverse conditions.

3. Circumference

Circumference

265/65 tires have 96 inches of circumference whereas 265/70 tires have 99.3 inches of circumference. The circumference difference between the two tires is 3.3 inches.

So, 265/70 tires have 3.3 inches or 3.44% more circumference length. It exceeds the 3% safe margin so 265/65 and 265/70 tires are not safe to interchange.

More circumference means lower revolutions per mile and better fuel economy. But it also causes a higher wear rate leading to durability issues.

4. Fuel Economy

Fuel economy of a tire depends on the contact section, friction rate, weight, revolutions per mile etc. 265/70 tires are heavier than 265/65 tires.

But 265/70 tires also have a higher circumference length means a lower revolution per mile than 265/65 tires. But the width and contact path of both tires are the same.

So, 265/70 tires provide better fuel mileage in terms of revolutions per mile and 265/65 tires are better in terms of weight and friction rate.

5. Stability and Control

Stability and control are important for a better driving experience. Bigger and heavier tires tend to have more stability and control. Both 265/65 and 265/70 tires have the same width range.

So, they will provide the same traction control. But 265/70 tires have better sidewall height and weight which is good for uneven terrains.

On the other hand, 265/65 tires provide better control in snowy and on-road situations.

6. Adverse Terrain Condition

Adverse terrain condition

Adaptability to adverse terrain conditions is important for better offroading and driving comfort.

265/70 tires have better sidewall height, weight and friction rate, which is good for uneven terrains. It will also decrease the vibration and bring comfort to driving.

265/65 tires are also good but it can’t surpass 265/70 tires in terms of driving comfort. Also, the adaptability with adverse terrain situations is lower for 265/65 tires than 265/70 tires.

Final Thoughts

There is not much difference between 265/65 and 265/70 tires.

Primary difference between the tires is in the tire aspect ratio which leads to the sidewall height difference.

There are also minor differences in overall diameter, revs per mile, circumference etc. which affect some performance factors of the vehicle.

I hope my writing will help you choose a suitable tire for your vehicle.

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