Tire Size 285/55r20 vs 285/60r20
As a car owner, you’re probably aware that your vehicle’s tires are essential for providing a smooth and safe ride. However, with so many different tire sizes available, it can be challenging to know which one to choose. This article will compare two popular tire sizes 285/55r20 and 285/60r20, to help you make an informed decision.
285/55r20 vs 285/60r20 Table
We’ll break down the key differences between these two tire sizes and provide you with all the necessary information to make an informed decision.
| Feature | 285/55r20 | 285/60r20 | Difference |
|---|---|---|---|
| Diameter | 32.34″ | 33.46″ | 1.12 inches |
| Width | 11.22″ | 11.22″ | same |
| Circum. | 101.61″ | 105.13″ | 3.53 inches |
| Sidewall Height | 6.17″ | 6.73″ | 0.56 inches |
| Revolutions | 623.58 | 602.67 | 20.91 |
Alternative Tire Size For 285/55r20
When it comes to replacing your vehicle’s tires, there’s an important rule to keep in mind: the new tires must be within 3% of the overall diameter of the original tires.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 245/60R20 | 31.6″ (802 mm) | -2.4% |
| 295/50R20 | 31.7″ (804 mm) | -2.2% |
| 275/55R20 | 31.9″ (810 mm) | -1.5% |
| 255/60R20 | 32″ (814 mm) | -1% |
| 305/50R20 | 32″ (814 mm) | -1% |
| 315/50R20 | 32.4″ (824 mm) | 0.2% |
| 265/60R20 | 32.5″ (826 mm) | 0.5% |
| 295/55R20 | 32.8″ (832 mm) | 1.2% |
| 325/50R20 | 32.8″ (834 mm) | 1.5% |
| 275/60R20 | 33″ (838 mm) | 1.9% |
| 305/55R20 | 33.2″ (844 mm) | 2.7% |
| 375/45R20 | 33.3″ (846 mm) | 2.9% |
Alternative Tire Size For 285/60r20
Your new tires must be within 3% of the overall diameter of your original tires. Yep, that’s the rule!
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 265/60R20 | 32.5″ (826 mm) | -2.8% |
| 295/55R20 | 32.8″ (832 mm) | -2.1% |
| 325/50R20 | 32.8″ (834 mm) | -1.9% |
| 275/60R20 | 33″ (838 mm) | -1.4% |
| 305/55R20 | 33.2″ (844 mm) | -0.7% |
| 375/45R20 | 33.3″ (846 mm) | -0.5% |
| 295/60R20 | 33.9″ (862 mm) | 1.4% |
| 355/50R20 | 34″ (864 mm) | 1.6% |
| 275/65R20 | 34.1″ (866 mm) | 1.9% |
| 305/60R20 | 34.4″ (874 mm) | 2.8% |
Overall Diameter
The overall diameter of a tire is the total height of the tire when it is mounted on a wheel and inflated. Regarding the 285/55R20 tire, its diameter measures 32.34 inches (821.5mm).
However, the 285/60R20 tire has a slightly bigger diameter of 33.46 inches (850mm), which is 1.12 inches (28.5mm) or 3.5% greater. A tire with a larger diameter can give off-road drivers the benefit of having better ground clearance.
Aspect Ratio
A tire’s aspect ratio is the height of the sidewall expressed as a percentage of the tire’s width. The 285/55r20 tire has an aspect ratio of 55, while the 285/60r20 tire has an aspect ratio of 60.
This means the 285/60r20 tire has a taller sidewall than the 285/55r20 tire. A taller sidewall can provide more cushioning, resulting in a more comfortable ride. The sidewall height of the 285/60r20 tire is 0.56 inches (9.1%) taller than the 285/55r20 tire.
Section Width
The section width of a tire is the width of the tire’s cross-section when mounted on a wheel and inflated. The 285/55R20 and 285/60R20 tires have the same section width of 11.22 inches (285mm).
This means that the contact patch of the two tires on the road will be identical, and there should be no noticeable difference in traction or handling due to the width of the tires.
Sidewall Height
The sidewall height of a tire is the distance from the rim’s edge to the tire’s outer edge when mounted on a wheel and inflated. The 285/55R20 tire has a sidewall height of 6.17 inches (156.75mm), while the 285/60R20 tire has a larger sidewall height of 6.73 inches (171mm), a difference of 0.56 inches (14.25mm) or 9.1%. A taller sidewall height can provide a smoother ride due to increased cushioning from the tire’s sidewall.
Rim Diameter
The rim diameter is the diameter of the wheel on which the tire is mounted. Both the 285/55r20 and 285/60r20 tires are designed to fit on a 20-inch rim. This means there is no difference in the rim diameter between the two tires.
Circumference
The 285/55R20 tire has a circumference of 101.61 inches (2580.82mm), while the 285/60R20 tire has a slightly larger circumference of 105.13 inches (2670.35mm), a difference of 3.53 inches (89.54mm) or 3.5%. A larger circumference tire will travel a longer distance with each revolution, which may result in slightly better fuel efficiency.
Our Observation
The 285/60R20 tire has a larger diameter and sidewall height, which can provide better ground clearance and a smoother ride due to increased cushioning. In addition, the 285/60R20 tire has fewer revolutions per mile, potentially contributing to better fuel efficiency.
On the other hand, the 285/55R20 tire has a smaller diameter and sidewall height, which may result in a more responsive driving experience and improved handling. However, the smaller diameter tire might have slightly worse fuel efficiency due to more revolutions per mile.
It’s important to note that both tire sizes have the same section width, meaning they will have a similar contact patch on the road and should provide comparable traction and handling.
Additionally, both tires are designed for 20-inch wheels and feature radial construction, which should provide a smooth and comfortable ride with good performance characteristics.
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