225/60r16 vs 215/70r16 Tire: What’s the Difference?

Can you use 215/70r16 and 225/60r16 tires in place of each other? Are these tires interchangeable? This question is a general query among car users. 

So, today our main focus will be on discussing the difference between 225/60r16 vs 215/70r16 tires. These differences are essential, so check if two tires can be interchanged.

So, if you are in a dilemma, see if you can use 215/70r16 tires instead of 225/60r16 tires and vice-versa. This guide is just meant for you.

225/60r16 vs 215/70r16 Tire: Comparison Table

The initial difference between 225/60r16 and 215/70r16 tires is the 10% aspect ratio. We will explore other changes in the comparison table below.

225/60r16 TireType215/70r16 Tire
26.63 inches or 676.4 mmDiameter difference 1.22 (31) 4.6% inches (mm)27.85 inches or 707.4 mm
8.86 inches 225 mmWidth difference -0.39 (-10) -4.4% inches (mm)8.46 inches 215 mm
83.36 Inches or 2124.97 mmCircumference difference 3.83 (97.39) 4.6% inches (mm)87.49 Inches or 2222.36 mm
5.31 inches or 135 mmSidewall Height difference 0.61 (15.5) 11.5% inches (mm)5.93 inches or 150.5 mm
757.35 RPM or 470.59 KMRevolutions per mile difference -33.19 (-20.62) -4.4%  (km)724.16 RPM or 449.97 KM

If we look into the comparison table above, we can see that there is a significant change of 4.6% in diameter and circumference changes between 225/60r16 and 215/70r16 tires. So there can be some severe issues with traction while driving.

Another very high alteration can be seen in the sidewall height difference, which is 11.5%. When you drive with such a height difference, you increase the vehicle’s clearance, which increases body roll and weight fraction, thus affecting the car’s stability and performance.

The revolution per minute between 225/60r16 and 215/70r16 tires is -4.4%. The main reason for it is that 225 tires are wider, producing fewer revolutions when compared to narrower 215 tires.

How to read the tire sizes 225/60r16 and 215/70r16?

There are four parts to the tire size 225/60r16, and each part bears a certain meaning. Before you decide to interchange or replace the tires, you must learn about them. Here is the explanation of each part of the tire size 225/60r16.

  • 225 means the width of the tires in millimeters
  • 60 shows the percentage of height to the width or the Aspect Ratio
  • R indicates Radial Construction
  • 16 indicates the Diameter of the Rim

Doing the Same for Tire Sizes 215/70r16

  • 215 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
  • 16 indicates the Diameter of the Rim

What’s The Difference Between 225/60r16 and 215/70r16 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 225/60r16 and 215/70r16 tires in terms of width, aspect ratio, construction materials, and rim diameter. 

Width

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 225/60r16 are 225. It means the width of that tire is 225 millimeters. 

Likewise, the three-digit number of 215/70r16 is 215. It means the Width of that tire is 215 millimeters. So the difference in the Width is 215 – 225 = -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 225/60r16 is 60, whereas the aspect ratio of 215/70r16 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, 225/60r16 Tire size has a width of 225 with an aspect ratio of 60%. So the sidewall height will be 225 x 0.60 or 5.3 inches or 135 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 215/70r16 is 5.9 inches. Hence, there’s a huge gap between the sidewall heights of the two tires.

This change affects the diameter, circumference, and other parameters.

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 225/60r16 and 215/70r16 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 225/60r16 is 16 inches. Similarly, the Rim Diameter of 215/70r16 is 16 inches.

It means that if your vehicle has a 16-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 225/60r16 vs 215/70r16 Tire

No, you cannot interchange between 225/60r16 and 215/70r16 tires as the diameter change between them is 4.6%. This diameter change is very big than the required 3% change.

Moreover, the sidewall length difference is also massively high. So even if you interchange these tires, your car will become taller, resulting in less comfortable driving.

Speedometer Difference: Using the current Tire Size 225/60r16 Instead Of the New Tire Size 215/70r16

Look at the Table. It shows differences in speedometer reading and the actual speed at any given time when the current Tire Size is 225/60r16 instead of 215/70r16.

Speedo ReadingActual Speed
20 mph (32.19 km/h)20.92 mph (33.66 km/h)
25 mph (40.23 km/h)26.15 mph (42.08 km/h)
30 mph (48.28 km/h)31.37 mph (50.49 km/h)
35 mph (56.33 km/h)36.6 mph (58.91 km/h)
40 mph (64.37 km/h)41.83 mph (67.32 km/h)
45 mph (72.42 km/h)47.06 mph (75.74 km/h)

Speedometer Difference: Using current Tire Size 215/70r16 Instead Of New Tire Size 225/60r16

The table shows the differences in speedometer reading and the actual speed at any given time when the current Tire Size is 215/70r16 instead of 225/60r16.

Speedo ReadingActual Speed
20 mph (32.19 km/h)19.12 mph (30.78 km/h)
25 mph (40.23 km/h)23.9 mph (38.47 km/h)
30 mph (48.28 km/h)28.69 mph (46.16 km/h)
35 mph (56.33 km/h)33.47 mph (53.86 km/h)
40 mph (64.37 km/h)38.25 mph (61.55 km/h)
45 mph (72.42 km/h)43.03 mph (69.25 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 225/60r16 tire with the 215/70r16 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 225/60r16 and 215/70r16

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: 225/60r16 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 exchange the tires properly. The large number on the sidewall shows the tire size.

For example, the mark 225/60r16 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 225/60r16 in Inches?

225/60r16 tires have a 26.6″ diameter, 8.9″ section width, and 16″ wheel diameter.

The circumference is 83.6″ and they make 758 revolutions per mile. The Sidewall Height of this Tire is 5.3 inches.

What Size Tires Is 215/70r16 in Inches?

215/70r16 tires have a diameter of 27.9″, a section width of 8.5″, and a wheel diameter of 16″.

The circumference is 87.5″ and they have 725 revolutions per mile. The Sidewall Height of this Tire is 5.9 inches.

Conclusion 

You now understand the distinctions between 225/60r16 and 215/70r16 tires and whether or not they are interchangeable. The thickness and diameter of the tires, despite some modest variances, are critical in creating or breaking any ride.

So you can’t just swap out any tire for another; some major measures and calculations must be completed before tire swapping.

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