What is the possible discussion of 245 75r16 vs 265 70r16, is it worth switching?

245 75r16 vs 265 70r16 is a significant question to ask and a topic to discuss. Because one has to consider the possible effects if they switch tiers. Here, these two options have quite different. They share variety in every specification aspect rim diameter and construction type.

Though one can replace tiers if they match the rim diameter and construction type, one has to look for the other possibilities too. Let’s have a look below to know the possible differences between this two-tier.

245 75r16 vs 265 70r16

245 75r16 vs 265 70r16       

If one is thinking about switching their tier type, they have to know the basic differences. They have to know what the variables are in between the existing and the new tier. Since tier is one of the crucial parts of the car, a wrong done can lead to a serious accident.

Also, it will absorb the shocks of the road. Besides, those will transmit traction, torque. After that, those will brake forces to the road surface to maintain the balance and change the direction of the road. These are the most important yet basic functions of the tire in a car.

To fulfill these four needs engineers selected the high-grade heavy-duty resilient rubber. They filled the tire with compressed air for accurate performance in the construction. As for the attachment with the car, the wheel has an inner and outer rim to hold it.

One may have seen the metal part of a wheel; this is the rim that holds the tire with the car. The rim is attached to the car with heavy-duty attachment nuts.

While selecting a tire for the car along with the quality, the size of the tire is the significant part. If one is familiar with the size index, they will know the letters and number of it. Those indicate so much about the tire.

In case one is not familiar with the terms, this article will help understand everything about it. The terms 265 70r16 and 245 75r16 indicate the size index of the tire. Those numbers and letters indicate the wide of the tire. As well as the aspect ratio and sidewalls of it.

One has to understand those to select the exact tire for their car. Because these numbers are important to fit the tire in the car. However, people often have the query about the differences between the 265 70r16 and 245 75r16 shares.

Initially, we can say that the difference is in the size index. They have some deep differences. Before going any further one must know which letter means what in terms of size indexing. If we break size index 265 70r16 and 245 75r16 we will get,

–265 or 245 is indicating the width of the tire in meters. 

— 70 or 75 means the aspects ratio of the height or width of the tire.

— R stands for construction type of tire.

–Finally, 16 indicates the Rim diameter in inches of the tire.

If we compare 265 70r16 and 245 75r16 we will have to compare the terms below


As the first part of the terms indicates the width of the tire, the terms 265 70r16 and 245 75r16 have 265 in first. That means there is some difference in width between this two. Because they share different numbers. One is 265 and another one is 245. Since the width of the tire is measured in millimeters, we can say they differ by 20 millimeters wide.

One does not have to confuse about the way of measuring the width. Because the manufacturer measures the width of the tire with highly accurate instruments. They measure the width from one sidewall to another. Since the width of the tire is similar one can select any of the two in terms of width.

Aspects Ratio

In terms of aspects ratio, one will find a huge difference between 265 70r16 and 245 75r16. The second term of the number is the aspect ratio. So, for the tire format 265 70r16 the aspect ratio is 70. Meanwhile, for 245 75r16 the aspect ratio is 75.

In the automobiles industry, the aspect ratio is calculated in percentage. So, the tire 265 70r16 has a 70% aspect ratio. On other hand, the tire 245 75r16 has a 75 aspect ratio. So, the aspect ratio of these two has differences of 5 which is a big deal in terms of tire size index.

Because the vertical cross-section of the tire is divided by the width to calculate the aspect ratio. A change of a bit can make huge differences and create major effects.

Construction Type

One can say the construction type of the tire by letter in the size index of the tire. Generally, the tire size index can have two types of construction type letters. They can find it in the sidewalls of the tire.

The letters are,

R- The letter R indicates the radial type of the tire.

B- It indicates the tire is a bias-ply type or aka cross-ply type.

As for 265 70r16 and 245 75r16, both have the letter R. That means both tires have radial type construction. So, there is no difference in construction type in both the tire. Because both have radial type construction.

Rim Diameter

The wide-open part inside the tier is the rim diameter. By this part, one has to attach the tire with the rim. Usually, the rim diameter is calculated in inches. The last part of the size index indicates the Rim diameter.

Considering the given size index of 265 70r16 and 245 75r16, we have 16 inches rim diameter for both the tire. Therefore, there are no differences in rim diameter between these two. So, both of them will be perfectly fit in 16 inches rim.

Let’s have a look into the differences in technical specifications

Diameter inches (mm)30.47 (773.9)30.61 (777.4)0.14 (3.5) 0.5%
Width inches (mm)9.65 (245)10.43 (265)0.79 (20) 8.2%
Circum. inches (mm)95.72 (2431.28)96.15 (2442.27)0.43 (11) 0.5%
Sidewall Height inches (mm)7.23 (183.75)7.3 (185.5)0.07 (1.75) 1%
Revolutions per mile (km)661.93 (411.31)658.95 (409.45)-2.98 (-1.85) -0.5%

As we can see from the comparison table above, both tire shares several differences in some criteria. Firstly, 265 70r16 and 245 75r16 share 0.5% differences in terms of Diameter. Secondly, in circumstances, the tires have 0.5% differences.

Thirdly, in sidewall height, they have 1% differences. The major difference is in width, and it is 8.2%. Finally, the last difference is in revolution per mile which is -0.5%.

What will be the speedometer differences for 265 70r16 and 245 75r16tires?

Speedo ReadingActual Speed
20 mph (32.19 km/h)20.09 mph (32.33 km/h)
25 mph (40.23 km/h)25.11 mph (40.42 km/h)
30 mph (48.28 km/h)30.14 mph (48.5 km/h)
35 mph (56.33 km/h)35.16 mph (56.58 km/h)
40 mph (64.37 km/h)40.18 mph (64.67 km/h)
45 mph (72.42 km/h)45.2 mph (72.75 km/h)
50 mph (80.47 km/h)50.23 mph (80.83 km/h)
55 mph (88.51 km/h)55.25 mph (88.91 km/h)
60 mph (96.56 km/h)60.27 mph (97 km/h)
65 mph (104.61 km/h)65.29 mph (105.08 km/h)
70 mph (112.65 km/h)70.32 mph (113.16 km/h)
75 mph (120.7 km/h)75.34 mph (121.25 km/h)
80 mph (128.75 km/h)80.36 mph (129.33 km/h)
85 mph (136.79 km/h)85.38 mph (137.41 km/h)
90 mph (144.84 km/h)90.41 mph (145.5 km/h)
95 mph (152.89 km/h)95.43 mph (153.58 km/h)

is it worth switching?

While one decides to switch from one tier to another, the main feature that comes to the front is the width and rim diameter of the tier. If one is thinking about switching between245 75r16 and 265 70r16, one may look for the possible risk and harm.

Luckily, both of the tier’s rim diameters are the same. So, there will be no problem with fitting. However, the tier has differences in width, aspect ratio which will not impact so much in the safety.

Therefore, one can switch the tier if it is necessary. However, they should stick to the same specification as to their old tier. In case the switching is mandatory they can choose the similar one.


We have discussed all the possible aspects of 245 75r16 vs 265 70r16. Now the decision is for users to make. Since choosing the tier type also depends on some other factors like the weather and the road condition, one has to think about it wisely.

Because a wrong choice in the tier can ruin everything. For a bad tier, one can even lose their life. However, replacing the tier with the same construction type and rim diameter is safe. But still, people should consider the other facts.

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