195/75r14 vs 205/70r14 Tire: What’s the Difference?

When considering tire sizes between 195/75r14 and 205/70r14 tires, one question often pops up; are they interchangeable?

You cannot interchange two tires without understanding the proper numbers and parameters. Tire interchanging requires some pretty deep knowledge regarding different factors like diameter difference, height, and more.

Hence, today in this post, we will discuss the differences between 195/75r14 vs 205/70r14 tires and everything else that you need to know regarding these changes. So, if you are dilemma about whether you can substitute them with each other, this guide is just for you.

195/75r14 vs 205/70r14 Tire: Comparison Table

A comparison of 195/75r14 and 205/70r14 tires may be seen in the table below. The aspect ratio changes by 5%, which has an impact on all other metrics such as width, diameter, and so on.

195/75r14 TireType205/70r17 Tire
25.52 inches or 648.1 mmDiameter difference -0.22 (-5.5) -0.8% inches (mm)25.3 inches or 642.6 mm
7.68 inches 195 mmWidth difference 0.39 (10) 5.1% inches (mm)8.07 inches 205 mm
80.16 inches or 2036.07 mmCircumference difference -0.68 (-17.28) -0.8% inches (mm)79.48 Inches or 2018.79 mm
5.76 inches or 146.25 mmSidewall Height difference -0.11 (-2.75) -1.9% inches (mm)5.65 inches or 143.5 mm
790.42 RPM or 491.14 KMRevolutions per mile difference 6.77 (4.2) 0.9% (km)797.18 RPM or 495.35 KM

One of the most crucial factors to look at while interchanging tires is the diameter and circumference change between the two tires. The comparison table above shows that between 195/75r14 and 205/70r14 tires, the change in diameter and circumference is only -0.8%. 

This small change shows you won’t feel any change in the driving experience regardless of which tire you use.

Next, we will look into the width of these tires. Compared to the 195/75r14 and 205/70r14 tires, the 205 mm tire is the heaviest and has the largest contact area. The 205 mm tire has much more slots due to its wider width.

In comparison to the 195 mm tires, this helps it to perform better in wet weather. As a result, the width variation is 5.1 %, the most among all other metrics.

The sidewall height difference is -1.9%, which indicates you won’t feel any bumpy rides if you decide to interchange these tires. Also, the revolutions per minute are nearly identical between 195/75r14 and 205/70r14 tires, as the change is only 0.9%.

How to read the tire sizes 195/75r14 and 205/70r14?

There are four parts to the tire size 195/75r14, and each part bears a certain meaning. Before you decide to interchange or replace the Tire, you must learn about them. Here is the explanation of each part of the tire size 195/75r14.

  • 195 means the width of the tires in millimeters
  • 75 shows the percentage of height to the width or the Aspect Ratio
  • R indicates Radial Construction
  • 14 indicates the Diameter of the Rim

Doing the Same for Tire Sizes 205/70r14

  • 205 means the width of the tires in millimeters
  • 70 shows the percentage of height to the width or the Aspect Ratio
  • R indicates Radial Construction
  • 14 indicates the Diameter of the Rim

What’s The Difference Between 195/75r14 and 205/70r14 Tire?

By now you’ve learned the basics of using two tires interchangeably, now let’s see implementing the theory in a real example. Below, we have compared 195/75r14 and 205/70r14 tires in terms of width, aspect ratio, construction materials, and rim diameter.


If you measure from one sidewall to the other sidewall of a tire, you will get the width. It is expressed in millimeters. You can instantly learn the Width of a tire just by looking at the tire size index.

The first three digits of a tire size index indicate the Width of that tire. As you can see, the first three digits of 195/75r14 are 195. It means the width of that tire is 195 millimeters.

Likewise, the three-digit number of 205/70r14 is 205. It means the Width of that tire is 205 millimeters. So the difference in the Width is 205 – 195 = 10 millimeters.

Now, if you switch to the tire size which is 0 millimeters more or less in Width, it shouldn’t be a problem. 

But you cannot switch tire size depending on Width only. You must consider the Sidewall Height as well. The Sidewall Height depends on Width and Aspect Ratio.

Aspect Ratio

As you can see, there’s a difference between the Aspect Ratio of the two tire sizes. The aspect ratio of 195/75r14 is 75, whereas the aspect ratio of 205/70r14 is 70.

So to check the interchangeability of these tires, our sole concern is to analyze how the differences in the aspect ratio impact the other measurements. Let’s start with the simple question first: what is the Aspect Ratio? And its relation with other measurements.

Aspect Ratio is the ratio of the sidewall from wheel to tread and the width. This measurement is usually represented in a percentage. 

In our example, 195/75r14 Tire size has a width of 195 with an aspect ratio of 75%. So the sidewall height will be 195 x 0.75 or 5.7 inches or 146.25 mm. You can get the number by simply putting the value on the equation.

Equation: Height of a Sidewall = Aspect Ratio of Tire x Width.

On the other hand, the Sidewall Height of 205/70r14 is 5.6 inches. Though the Aspect Ratio of the two tire sizes is different, they have almost a similar sidewall height.

Hence 205/70 is wider but interchangeable with 195/70.

Construction Type

The tire size index informs you about the Construction Type of a tire. It is expressed by a letter in the tire size index. 

Both 195/75r14 and 205/70r14 have the same letter ‘R’. So, both the tires have Radial Construction in terms of construction type.

Such tires have a sophisticated construction with square footprints on the top. The Radial tires are ideal for driving on-road. 

They are resistant to heat and water. They are next-gen tires and can provide great fuel efficiency.  

Another famous construction type is Bias Ply. They are also known as Cross-ply. It is expressed by the letter ‘B’ in a tire size index. This type is great for driving off-road.

Rim Diameter

To know which tire size fits your vehicle, you must know the wheel rim size of your vehicle as well as the Rim Diameter of a tire. 

For instance, if your vehicle has a 16-inch wheel rim, you can use the tire which has a 16-inch Rim Diameter.

By looking at a tire size index, you can learn instantly the Rim Diameter of a tire. The last two digits of a tire size index indicate the Rim Diameter. It is measured in inches. 

As you can see, the Rim Diameter of 195/75r14 is 14 inches. Similarly, the Rim Diameter of 205/70r14 is 14 inches.

It means that if your vehicle has a 14-inch wheel rim, you can use both tire sizes. But make sure to use the same size tires for all the wheels.

Can You Interchange Between 195/75r14 and 205/70r14 tires?

Yes, you can interchange between 195/75r14 and 205/70r14 tires as they only have a diameter change of -0.8% which is in the range of required diameter change of 3% or less.

So, when you interchange these tires, the overall performance won’t show much fluctuation. The speed may slow down a bit as 205 tires are wider than 195 series.

Speedometer Difference: Using the current Tire Size 195/75r14 Instead Of the New Tire Size 205/70r14

Look at the Table. It shows differences in speedometer reading and the actual speed at any given time when the current Tire Size is 195/75r14 instead of 205/70r14. 

Speedo ReadingActual Speed
20 mph (32.19 km/h)19.83 mph (31.91 km/h)
25 mph (40.23 km/h)24.79 mph (39.89 km/h)
30 mph (48.28 km/h)29.75 mph (47.87 km/h)
35 mph (56.33 km/h)34.7 mph (55.85 km/h)
40 mph (64.37 km/h)39.66 mph (63.83 km/h)
45 mph (72.42 km/h)44.62 mph (71.81 km/h)

Speedometer Difference: Using current Tire Size 205/70r14 Instead Of New Tire Size 195/75r14

The table shows the differences in speedometer reading and the actual speed at any given time when the current Tire Size is 205/70r14 instead of 195/75r14.

Speedo ReadingActual Speed
20 mph (32.19 km/h)18.96 mph (30.51 km/h)
25 mph (40.23 km/h)23.7 mph (38.14 km/h)
30 mph (48.28 km/h)28.44 mph (45.77 km/h)
35 mph (56.33 km/h)33.18 mph (53.4 km/h)
40 mph (64.37 km/h)37.92 mph (61.02 km/h)
45 mph (72.42 km/h)42.66 mph (68.65 km/h)

What you must consider Before Interchange or Replace Tire? 

There are important things to consider before replacing or swiping the Tires. You cannot simply replace the 195/75r14 tire with the 205/70r14 tire that is in a different shape.

For example, if the aspect ratio of the existing tire is 40%, replacing it with a tire that has an aspect ratio of  45% might not be a good option.

Doing so will have various consequences on the car’s overall performance, such as variations in top speed and speedometer.

However, to a certain extent, such as minor changes in the diameter or the sidewall, you can switch Tires. However, this can only be done in compliance with the manufacturers’ recommendations.

Anyway, when replacing the Tire, the simple guideline to follow is that the current tire’s size, load index, and speed rating should all match with the replacement Tire.

Load Index and Speed Index of a Tire 195/75r14 and 205/70r14

The load index refers to the maximum load-bearing capacity, whereas the speed index refers to the Tire’s maximum allowable speed at a full load. These are very crucial stats to know before you decide to interchange tires.

Index information can be found on the sidewall right after the Tire size number. It is a combination of numbers and letters that bear a particular meaning. 

Here is an example of how the index information is usually written on the sidewall: 195/75r14 90A. The 90A stands for load and speed index, with 90 indicating a maximum load-bearing capacity of 600 kg, whereas ‘A’ denotes an allowed speed of up to 170 km/h.

Check the load and speed index. They must be as close as possible to fit precisely. These values change depending on the vehicle’s weight and wheel size. Here is a table that shows various load and speed indexes, so you get the idea.

Load IndexKgSpeed IndexSpeed Limit
65290QUp to 160 Km/h
66300RUp to 170 Km/h
67307SUp to 180 Km/h
68315TUp to 190 Km/h
69325HUp to 210 Km/h

Size of the Tire 

The size of the Tire is another vital piece of information to know to exchange the tires properly. The large number on the sidewall shows the tire size.

For example, the marking 195/75r14 on the sidewall represents the size of the Tire. You can also find it in the user manual, on the sidewall, and in other places such as inside the fuel flap or glove compartment.

What Size Tires Is 195/75r14 in Inches?

195/75r14 tires have a 25.5″ diameter, 7.7″ section width, and 14″ wheel diameter.

The circumference is 80.1″ and they make 791 revolutions per mile. The Sidewall Height of this Tire is 5.7 inches.

What Size Tires Is 205/70r14 in Inches? 

205/70r14 tires have a diameter of 25.3″, a section width of 8.1″, and a wheel diameter of 14″.

The circumference is 79.4″ and they have 798 revolutions per mile. The Sidewall Height of this Tire is 5.6 inches.


Every tire size does have its own set of advantages and disadvantages. It’s critical to pick one that matches your tastes and fits your car. After reading this article, you should know if 195/75r14 and 205/70r14 tires may be interchanged.

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