275 55r20 vs 285 65r20 Tire Size
There are a few things to consider when choosing a tire size, including the type of vehicle you have and the driving conditions you typically encounter. Both of these sizes have their pros and cons, and it can be challenging to decide which one is right for you. This blog post will compare 275 55r20 and 285 65r20 tires and help you determine what size is right for you!
275/55r20 vs 285/65r20 Table
285 65r20 | 275 55r20 |
Overall Diameter 34.59 inches | Overall Diameter 31.91 inches |
Width 11.22 inches | Width 10.83 inche |
Sidewall Height 7.29 inches | Sidewall Height 5.95 inches |
Radial Tire (A Radial-Ply Tire) | Radial Tire (A Radial-Ply Tire) |
Rim Size 18 inches | Rim Size 18 inches |
Circumference 108.66 inches | Circumference 100.25 inches |
Revs Per Mile 583 | Revs Per Mile 632 |
What Does 275 55r20 Tire Mean?
The 275 55r20 tire size is standard for light trucks and SUVs. This size offers a good balance of traction and comfort, and it can handle most driving conditions without issue. The main downside to this size is that it can be more expensive than other options.
275 55r20 tires typically have a width of 275mm and a diameter of 20 inches. The “R” in the size designation means that the tire is radial, and the “55” indicates the aspect ratio. This refers to the height of the tire sidewall, and it is expressed as a percentage of the width.
Tire Diameter
The height of the tire affects the amount of contact patch, which is the area of the tire that touches the ground. A taller tire will have a smaller contact patch, which can lead to reduced traction. Generally, a taller tire is better suited for off-road driving, while a shorter tire is better for on-road driving.
The 275 55r20 tire size height is 31.91 inches, while 34.59 inches is the height of the 285 65r20 tire size. The difference between those tire sizes is 2.68 inches or 7.7%.
Section Width
A wider tire will have a larger contact patch, which can lead to increased traction. Generally, a wider tire is better suited for off-road driving, while a narrower tire is better for on-road driving. The width of the 275 55r20 tire size is 275mm, while 285mm is the width of the 285 65r20 tire size. The difference between those tire sizes is only 0.39 inches or 3.5%.
Circumference
The circumference of a tire is the distance around the outside of the tire. This measurement is important because it affects the gear ratio of your vehicle. A larger tire will have a higher gear ratio, leading to increased fuel economy.
The circumference of the 275 55r20 tire size is 100.25 inches, while 108.66 inches is the circumference of the 285 65r20 tire size. The difference between those tire sizes is only 8.41 inches or 7.7%.
Revolutions Per Mile
The number of revolutions per mile (RPM) is a measure of how fast a tire turns. This measurement is important because it affects the fuel economy of your vehicle. A higher RPM tire will have a lower gear ratio, which can lead to increased fuel economy.
The RPM of the 275 55r20 tire size is 632, while the RPM of the 285 65r20 tire size is 583. The difference between those tire sizes is only 49 RPM or 8.4%. As you can see, there are a few things to consider when choosing a tire size.
Sidewall Height
A taller sidewall will have a smaller contact patch, which can lead to reduced traction. In general, a taller sidewall is better suited for off-road driving, while a shorter sidewall is better for on-road driving.
The sidewall height of the 275 55r20 tire size is 55% of the width, which is 5.95 inches, while the sidewall height of the 285 65r20 tire size is 65% of the width which is 7.29 inches. The difference between those tire sizes is only 1.34 inches or 18.4%.
Wheel Size
In general, a larger wheel will have a smaller contact patch, which can lead to reduced traction. Generally, a larger wheel is better suited for off-road driving, while a smaller one is better for on-road driving.
The wheel size of the 275 55r20 tire size is 20 inches while the wheel size of the 285 65r20 tire size is 20 inches. Both tire sizes can mount 20 inches wheel size.
Construction Type
Radial tires are the most common type of tire, and they are designed to handle most driving conditions without issue. The main downside to this type of tire is that it can be more expensive than other types of tires. Both tire sizes 275 55r20 and 285 65r20 are radial tires.
Our Observation
The main difference between 275 55r20 and 285 65r20 tire sizes is in the sidewall height. 285 65r20 tire size is 1.34 inches or 18.4% taller than 275 55r20 tire size. Besides sidewall height, there is not much difference between those two tire sizes. They both can mount 20 inches wheel size, and they are both radial tires.
Conclusion
If you are looking for a tire size that is better suited for off-road driving, then the 285 65r20 tire size is a better choice. However, if you are looking for a tire size that is better suited for on-road driving, then the 275 55r20 tire size is a better choice.
Ultimately, deciding which tire size to choose is up to you and what your driving needs are. If you have any questions or comments, please feel free to leave them below. We would be happy to help! Thanks for your interest in our blog!
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