225/60r16 vs 225/65r16 Tire: What’s the Difference?

If you’re planning on replacing your tires soon, you might be wondering whether or not you can use a 225/60r16 tire on a car that takes a 225/65r16. After all, they look alike. 

So, naturally, you will want to comprehend if they are interchangeable.

And here, in this article, we will explain that particular query along with a comparison table of the difference between 225/60R16 vs 225/65R16 and tell you precisely the reason behind whether the tires are interchangeable or not. Let’s start then.

225/60r16 vs 225/65r16 Tire: Comparison Table

Here is a short comparison table between 265/60r16 vs a 265/65r16 tire given below. 

225/60r16 TireType225/65r16 Tire
26.63 Inches or 676.4 mmDiameter difference 0.89 (22.5) 3.3% inches (mm)27.52 inches or 698.9 mm
8.86  inches or 225 mmWidth difference 0 (0) 0% inches (mm)8.86  inches or 225 mm
83.66 inches or 2124.97 mmCircumference difference 2.78 (70.69) 3.3% inches (mm)86.44 Inches or 2195.66 mm
5.31 inches or 135 mmSidewall Height difference 0.44 (11.25) 8.3% inches (mm)5.76 inches or 146.25 mm
757.35 RPM or 470.59 KMRevolutions Per Mile difference -24.38 (-15.15) -3.2% (km)732.97 RPM or 455.44 KM

In sum, the total discrepancy between revolutions per mile of these tires is 3.2% (24.38 miles or 15.15 km), where 225/60r16 tire’s RPM is 757.35 mile (470.59 km), and 225/65r16 tire’s RPM is 732.97 mile (455.44 km).

This means 225/60r16 is slightly faster in rotation per minute than 225/65r16 tire. 

On the other hand, the tire diameter of 225/60r16 is smaller than 225/65r16, making the rear-axle gearing a factor in the final drive ratio of 225/65r16, which affects overall acceleration performance better than its rivals.

How to read the tire sizes 225/60r16 and 225/65r16?

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

Doing the Same for Tire Sizes 225/65r16

  • 225 means the width of the tires in millimeters
  • 65 shows the percentage of height in relation 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 225/65r16 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 225/65r16 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 225/65r16 tire is 225. It means the Width of that tire is 225 millimeters. So the difference in the Width is 225 – 225 = 0 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, the only difference between the two Tire sizes is the aspect ratio. The aspect ratio of 225/60r16 is 60, whereas the aspect ratio of 225/65r16 is 65. On the other hand, the Width and the Rim Diameter of the two Tire sizes are identical. 

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 mm 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 225/65r16 is 5.8 inches.

Though the Width of the two tire sizes is identical, there’s a gap between the sidewall heights because of the Aspect Ratio.

This change affects the value of diameter, circumference, and the total number of revolutions per mile.

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 225/65r16 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 for 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 225/65r16 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 and 225/65r16?

No, you cannot interchange 225/60r16 and 225/65r16 tires.

This is largely due to the different sizes of tires. Each has a different diameter difference (3.3%) and a staggering 8.3% (0.44 inches or 11.25 mm), so they will not fit on the same car.

Also, tires can be interchangeable only if the diameter disparity is under or equal to 3%, which is not the case for these two tires (0.3% over the 3% mark).

Speedometer Difference: Using the current Tire Size 225/60r16 Instead Of the New Tire Size 225/65r16

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 225/65r16. 

Speedo ReadingActual Speed
20 mph (32.19 km/h)20.67 mph (33.26 km/h)
25 mph (40.23 km/h)25.83 mph (41.57 km/h)
30 mph (48.28 km/h)31 mph (49.89 km/h)
35 mph (56.33 km/h)36.16 mph (58.2 km/h)
40 mph (64.37 km/h)41.33 mph (66.52 km/h)
45 mph (72.42 km/h)46.5 mph (74.83 km/h)

Speedometer Difference: Using current Tire Size 225/65r16 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 225/65r16 instead of 225/60r16.

Speedo ReadingActual Speed
20 mph (32.19 km/h)19.36 mph (31.15 km/h)
25 mph (40.23 km/h)24.2 mph (38.94 km/h)
30 mph (48.28 km/h)29.03 mph (46.73 km/h)
35 mph (56.33 km/h)33.87 mph (54.51 km/h)
40 mph (64.37 km/h)38.71 mph (62.3 km/h)
45 mph (72.42 km/h)43.55 mph (70.09 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 225/65r16 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 225/65r16

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 marking 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 225/65r16 in Inches?

225/65r16 tires have a diameter of 27.5″, a section width of 8.9″, and a wheel diameter of 16″. 

The circumference is 86.4″ and they have 733 revolutions per mile. The Sidewall Height of this Tire is 5.8 inches.

Conclusion 

In conclusion, while 225/60r16 and 225/65r16 tires are not interchangeable, they both offer excellent ride quality and can provide motorists with long-lasting performance. 

If you’re planning to go into the market for a new set of tires, be sure to choose the appropriate size for your vehicle. If you’re not sure which size tire your vehicle requires, it is always best to consult a mechanic.

Related Posts:

Similar Posts