Tire Size 285/70r17 vs 275/70r18
Two popular sizes that are often compared are the 285/70r17 and 275/70r18. This article will explore the differences between these two tire sizes and help me understand them. Keep reading to learn more!
285/70r17 vs 275/70r18 Table
This table shows a comparison of the two tire sizes and helps you to decide which one is better for you.
| Feature | 275/70R18 | 285/70R17 | Difference |
|---|---|---|---|
| Diameter inches | 33.16″ | 32.71″ | 0.45 inch |
| Width inches | 10.83″ | 11.22″ | 0.39 inch |
| Circum. inches | 104.17″ | 102.76″ | 1.41 inch |
| Sidewall Height | 7.58″ | 7.85″ | 0.28 inch |
| Revolutions | 608.25 | 616.6 | 8.35 |
Alternative Tire Size 285/70r17
There are several alternative tire sizes available to replace 285/70R17, and you can utilize a table chart to compare them.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 235/80R17 | 31.8″ (808 mm) | -2.9% |
| 345/55R17 | 32″ (812 mm) | -2.4% |
| 255/75R17 | 32″ (814 mm) | -2.2% |
| 275/70R17 | 32.2″ (818 mm) | -1.7% |
| 305/65R17 | 32.6″ (828 mm) | -0.5% |
| 235/85R17 | 32.8″ (832 mm) | 0% |
| 255/80R17 | 33.1″ (840 mm) | 1% |
| 295/70R17 | 33.3″ (846 mm) | 1.7% |
Alternative Tire Size 275/70r18
There are several options available if you are seeking alternative tire sizes to replace 275/70R18. You may use a table chart to compare these options.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 305/60R18 | 32.4″ (823 mm) | -2.4% |
| 285/65R18 | 32.6″ (827 mm) | -1.9% |
| 265/70R18 | 32.6″ (829 mm) | -1.7% |
| 375/50R18 | 32.8″ (833 mm) | -1.2% |
| 295/65R18 | 33.1″ (841 mm) | -0.2% |
| 325/60R18 | 33.3″ (847 mm) | 0.5% |
| 305/65R18 | 33.6″ (853 mm) | 1.2% |
| 285/70R18 | 33.7″ (857 mm) | 1.7% |
Overall Diameter
The overall diameter of a tire is an important factor to consider when choosing a new set of tires. The 285/70r17 tire has an overall diameter of 32.71 inches (830.8 mm), while the 275/70r18 has a diameter of 33.16 inches (842.2 mm).
This means that the 275/70r18 tire is slightly larger than the 285/70r17 tire, with a difference of 0.45 inches (11.4 mm) or 1.4%. A larger tire can provide better ground clearance, while a smaller tire can improve acceleration and handling.
Section Width
The section width of a tire refers to the distance between the two sidewalls when the tire is mounted and inflated. The 285/70r17 tire has a section width of 11.22 inches (285 mm), while the 275/70r18 tire has a section width of 10.83 inches (275 mm).
This means that the 285/70r17 tire is wider than the 275/70r18 tire, with a difference of 0.39 inches (10 mm) or 3.6%. A wider tire can provide better traction and stability, while a narrower tire can improve fuel efficiency and reduce road noise.
Circumference
The circumference of a tire is the distance around the outer edge of the tire. The 285/70r17 tire has a circumference of 102.76 inches (2610.04 mm), while the 275/70r18 tire has a circumference of 104.17 inches (2645.85 mm).
This means that the 275/70r18 tire has a larger circumference than the 285/70r17 tire, with a difference of 1.41 inches (35.81 mm) or 1.4%. A tire with a larger circumference can cover more distance per revolution, while a smaller circumference tire can provide better acceleration and braking performance.
Revolutions Per Mile
Revolutions Per Mile (RPM) is how many times the tire will go around in one mile. The 285 70r17 has an RPM of 616, while the 275 70r18 has an RPM of 608. This means the 285 70r17 will go around 8.35 miles more in one mile than the 275 70r18.
The 285 70r17 has a higher RPM than the 275 70r18, which means it will go around more in one mile. If you are looking for a tire that will go approximately more in one mile, then the 285 70r17 may be a better option for you.
Sidewall Height
The sidewall height of a tire refers to the distance between the rim and the outer edge of the tire. The 285/70r17 tire has a sidewall height of 7.85 inches (199.5 mm), while the 275/70r18 tire has a sidewall height of 7.58 inches (192.5 mm).
This means that the 285/70r17 tire has a taller sidewall than the 275/70r18 tire, with a difference of 0.28 inches (7 mm or 3.6%. A taller sidewall can provide better cushioning and protection against potholes and rough roads, while a shorter sidewall can improve handling and cornering.
Wheel Size
The 285 70r17 has a wheel size of 17 inches, while the 275 70r18 has a wheel size of 18 inches. This means the 275 70r18 has a larger wheel size than the 285 70r17. So the 285 70r17 tire size is mounted in the 17-inch rim size, and the 275 70r18 tire size can mount in the 18-inch rim size.
Construction Type
The construction type of a tire refers to how it is built, which can affect its performance and durability. The 285/70r17 tire and the 275/70r18 tire are all-season, all-terrain tires designed to balance on-road and off-road performance. They both feature a reinforced construction that can provide better durability and resistance to punctures.
Our Observation
The 275/70r18 tire is slightly larger than the 285/70r17 tire in terms of diameter and circumference, while the 285/70r17 tire is wider and has a taller sidewall. The 275/70r18 tire requires a larger rim size than the 285/70r17 tire.
In terms of performance, a larger diameter tire can provide better ground clearance and more distance covered per revolution, while a wider tire can provide better traction and stability.
A taller sidewall can provide better cushioning, while a larger rim size can provide better handling and stability. However, these differences can also affect fuel efficiency and ride comfort.
Choosing between the 285/70r17 and the 275/70r18 tire will ultimately depend on your specific needs and preferences. It’s important to consider factors such as driving conditions, vehicle type, and personal driving style when choosing a tire size.
