275 65r20 vs 305 55r20 Tire Size
If you’re looking for a new set of tires, you may be wondering whether to go with 275 65r20 or 305 55r20. Both sizes have their pros and cons, so it can be tough to decide which is right for you. This blog post will break down the differences between these two sizes and help you decide which one is best for your needs.
275 65r20 vs 305 55r20 Table
275 65r20 | 305 55r20 |
 |  |
Diameter 34.07 inches | Diameter 33.21 inches |
Width 10.83 inches | Width 12.01 inche |
Sidewall Height 7.04 inches | Sidewall Height 6.6 inches |
Radial Tire (A Radial-Ply Tire) | Radial Tire (A Radial-Ply Tire) |
Rim Size 20 inches | Rim Size 20 inches |
Circumference 107.05 inches | Circumference 104.33 inches |
Revs Per Mile 591 | Revs Per Mile 607 |
Aspect Ratio 65% Of Its Width | Aspect Ratio 55% Of Its Width |
What Does 275 65r20 Tire Mean?
The 275 65r20 tire size means that the tire is 275mm wide and has a sidewall height of 65% of the width. The “r” in this size indicates that it is a radial tire, and the 20 refers to the diameter of the wheel in inches. They are a popular choice for SUV and truck owners who want a little extra ground clearance and traction.
If you frequently drive in off-road or winter conditions, then a 275 65r20 tire may be a good option for you. One downside of 275 65r20 tires is that they can be more expensive than other sizes. They are also not as widely available as some different sizes, so you may have to shop around to find a set that meets your needs.
Tire Width
When comparing these two sizes, the first thing you’ll notice is that the 275 65r20 is wider than the 305 55r20. The main difference between 275 65r20 and 305 55r20 Tire is width. The 275 65r20 is 10.83 inches in width, while the 305 55r20 is only 12.01 inches wide.
The extra width can provide more traction and stability, which can be helpful in off-road or winter driving conditions. However, the wider tires may also make your vehicle more difficult to handle on dry, paved roads.
Aspect Ratio
The aspect ratio is the second number in the tire size. It indicates the sidewall height as a percentage of the width. For example, a 275 65r20 tire has a sidewall height of 65% of the width, which is 178.75 millimeters. The 305 55r20 has a sidewall height of 55% of the width, 167.75 millimeters. This means that the 275 65r20 has a taller sidewall than the 305 55r20.
Construction Type
Both the 275 65r20 and 305 55r20 are radial tires. Radial tires are the most common type of tire on the market. They are designed with steel belts that run radially (across the tire) from the bead to the tread. They are also more resistant to heat so they can be used at higher speeds without fear of failure.
Rim Size
The last number in the tire size indicates the diameter of the wheel in inches. The 275 65r20 has a rim size of 20 inches, while the 305 55r20 has a rim size of 20 inches. This means that both tires can be used on vehicles with 20-inch rims. This can give your vehicle a slightly lower profile, which may improve its aerodynamics. It can also make the tire easier to handle on dry, paved roads.
Circumference
The circumference is the distance around the outside of the tire. The 275 65r20 has a circumference of 107.05 inches, while the 305 55r20 has a circumference of 104.33 inches. This means that the 275 65r20 is slightly larger than the 305 55r20.
Revolutions Per Mile
The number of revolutions per mile (RPM) is a measure of how far the tire will travel in one mile. The 275 65r20 has an RPM of 591, while the 305 55r20 has an RPM of 607. This means that the 275 65r20 will travel slightly less distance in one mile than the 305 55r20.
Our Observation
Both the 275 65r20 and 305 55r20 have their pros and cons. The 305 55r20 is more comprehensive and has a taller sidewall, which can provide more traction and stability. However, the wider tires may also make your vehicle more difficult to handle on dry, paved roads. The 275 65r20 has a smaller width and sidewall height, making it easier to handle on dry, paved roads.
However, the smaller tires may provide less traction and stability in off-road or winter driving conditions. You should choose the tire size that best meets your needs based on the type of driving you do most often. If you frequently drive in off-road or winter conditions, then a 305 55r20 tire may be a good option for you. If you mostly drive on dry, paved roads, then a 275 65r20 tire may be better.
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