Choosing the proper tire size is essential for striking the ideal balance between performance, comfort, and style if you own a car or truck. Because of this, the argument over whether to use 285/70r17 or 275/70r18 tire sizes has become a heated topic among fans of cars and trucks.
Although both sizes are common choices, which one fits your vehicle the best? To assist you in making a wise choice, we’ll go over the main distinctions between different tire sizes in this article.
Whether you’re looking for improved better handling, better off-road capability, or a more aggressive appearance. Now grab a seatbelt and let’s explore the world of tire sizes!
Comparison Table: 285/70r17 vs 275/70r18 Tire Size
With the help of our thorough comparison chart, learn the main distinctions between 275/70R18 and 285/70R17 tire sizes. It is simple to determine which tire size is ideal for your vehicle’s handling, fuel efficiency, and performance requirements.
| Features | 285/70R17 Tire Size | 275/70R18 Tire Size |
|---|---|---|
| Rim Diameter (inches) | 17 | 18 |
| Tire Section Width (mm) | 285 | 275 |
| Sidewall Height (mm) | 199.5 | 192.5 |
| Overall Diameter (inches) | 32.7 | 32.2 |
| Recommended Rim Width (inches) | 7.5 – 9 | 7 – 8.5 |
| Revolution Per Mile | 635 | 645 |
| Circumference (inches) | 102.8 | 101.1 |
| Load Capacity (lbs) | Approx. 3195 – 3300 | Approx. 3085 – 3195 |
| Speed Rating | R (106 mph) – S (112 mph) | R (106 mph) – S (112 mph) |
| Treadwear Rating | Approx. 400 – 600 | Approx. 400 – 600 |
| Traction Score | AA, A, B | AA, A, B |
| Temperature Score | A, B, C | A, B, C |
| Maximum Pressure (psi) | Approx. 50 – 65 | Approx. 50 – 65 |
| Flat Road & Highway Performance | Good handling and stability | Slightly better fuel efficiency |
| Off-Road Performance | Better traction on loose terrain | Slightly less off-road traction |
Rim Diameter
- 285/70R17 tires have a rim diameter of 17 inches
- 275/70R18 tires have a rim diameter of 18 inches
The rim diameter determines the size of the wheel the tire is designed to fit. The two tire sizes are designed for different wheel sizes, which can impact handling and vehicle appearance.
Tire Section Width
- 285/70R17 tires have a section width of 285mm
- 275/70R18 tires have a section width of 275mm
The section width is the width of the tire from sidewall to sidewall. The 285/70R17 tire has a wider section width, which can provide better traction, especially in off-road conditions.
Sidewall Height
- 285/70R17 tires have a sidewall height of 199.5mm
- 275/70R18 tires have a sidewall height of 192.5mm
Sidewall height refers to the distance between the tire’s bead and the outer edge of the tread. The 285/70R17 tire has a taller sidewall, which can offer a more comfortable ride due to its ability to absorb road imperfections.
Overall Diameter
- 285/70R17 tires have an overall diameter of 32.7 inches
- 275/70R18 tires have an overall diameter of 32.2 inches
The overall diameter is the total height of the tire when inflated. The 285/70R17 tire is slightly larger in diameter, which can impact vehicle clearance and speedometer accuracy.
Rim Width
- 285/70R17 tires are recommended for rim widths of 7.5 to 9 inches
- 275/70R18 tires are recommended for rim widths of 7 to 8.5 inches
Rim width is the distance between the inner edges of the wheel where the tire bead sits. Each tire size has a recommended rim width range to ensure proper fitment and performance.
Revolution Per Mile
- 285/70R17 tires have approximately 635 revolutions per mile
- 275/70R18 tires have approximately 645 revolutions per mile
Revolution per mile is the number of times a tire rotates in one mile. The 275/70R18 tire has a slightly higher revolution per mile, which can impact speedometer accuracy and fuel efficiency.
Circumference
- 285/70R17 tires have a circumference of 102.8 inches
- 275/70R18 tires have a circumference of 101.1 inches
Circumference is the distance around the outer edge of the tire. The 285/70R17 tire has a larger circumference, which can affect speedometer accuracy and ride comfort.
Load Capacity
- 285/70R17 tires have an approximate load capacity of 3195 to 3300 lbs
- 275/70R18 tires have an approximate load capacity of 3085 to 3195 lbs
Load capacity refers to the maximum weight a tire can safely support when properly inflated. Generally, 285/70R17 tires have a slightly higher load capacity compared to 275/70R18 tires.
Speed Rating
Both 285/70R17 and 275/70R18 tires can have speed ratings of R (106 mph) or S (112 mph)
The speed rating of a tire indicates the maximum speed at which the tire can safely carry a load. Both tire sizes can have similar speed ratings, but always check the specific tire model for its speed rating.
Treadwear Rating
- 285/70R17 tires have an approximate treadwear rating of 400 to 600
- 275/70R18 tires have an approximate treadwear rating of 400 to 600
Treadwear rating indicates the tire’s relative wear rate under controlled conditions. Both tire sizes have similar treadwear ratings, but individual tire models may have different wear rates.
Traction Score
Both 285/70R17 and 275/70R18 tires can have traction scores of AA, A, or B. The traction score represents a tire’s ability to stop on wet pavement under specific test conditions.
Both tire sizes can have similar traction scores, but it is essential to check the specific tire model for its traction rating.
Temperature Score
Both 285/70R17 and 275/70R18 tires can have temperature scores of A, B, or C
Temperature score reflects a tire’s ability to dissipate heat under controlled conditions. Both tire sizes can have similar temperature scores, but always check the specific tire model for its temperature rating.
Maximum Pressure
Both 285/70R17 and 275/70R18 tires have an approximate maximum pressure range of 50 to 65 psi
Maximum pressure is the highest amount of air pressure a tire can safely hold when properly inflated. Both tire sizes have a similar maximum pressure range, but always check the specific tire model for its recommended pressure.
Flat Road & Highway Performance
- 285/70R17 tires offer good handling and stability on flat roads and highways
- 275/70R18 tires provide slightly better fuel efficiency on flat roads and highways
The 285/70R17 tire size offers good performance on flat roads and highways, while the 275/70R18 tire size may provide slightly better fuel efficiency due to its smaller width and diameter.
Off-Road Performance
- tires have better traction on loose terrain
- 275/70R18 tires have slightly less off-road traction
When it comes to off-road performance, the wider section width of the 285/70R17 tire size offers better traction on loose terrain, while the 275/70R18 tire size has slightly less off-road traction due to its smaller width.
Alternative Tire Sizes Of 285/70r17 vs 275/70r18 Tire Size
| Alternative Tire Size | Diameter (inches) | Diameter Difference with 285/70R17 | Diameter Difference with 275/70R18 |
| 265/70R17 | 31.6 | -1.1 | -0.6 |
| 285/75R16 | 32.8 | +0.1 | +0.6 |
| 275/65R18 | 31.1 | -1.6 | -1.1 |
| 265/65R18 | 30.6 | -2.1 | -1.6 |
| 265/75R16 | 31.6 | -1.1 | -0.6 |
| 285/65R18 | 32.6 | -0.1 | +0.4 |
| 275/60R20 | 32.8 | +0.1 | +0.6 |
| 295/70R17 | 33.3 | +0.6 | +1.1 |
| 305/65R17 | 32.6 | -0.1 | +0.4 |
| 295/65R18 | 33.1 | +0.4 | +0.9 |
Our Opinion On 285/70r17 vs 275/70r18 Tire Size
Depending on your preferences and driving conditions, both tire sizes—285/70R17 and 275/70R18—have advantages and disadvantages. Our assessment of the variations between the two tire sizes is provided below:
Performance on Level Highways and Roads
Due to its narrower width and diameter, the 275/70R18 tire size may provide marginally greater fuel efficiency, making it more appropriate for lengthy highway rides.
On flat roads and highways, the 285/70R17 tire size offers decent handling and stability but may have somewhat less fuel efficiency than the 275/70R18.
Off-Road Capability
Due to its wider section width, the 285/70R17 tire size provides higher traction on loose terrain, making it a superior option for off-roading aficionados.
Although the 275/70R18 tire size offers a little less off-road grip, it still works admirably in the majority of off-road scenarios.
Looks and aesthetics
Some drivers may appreciate the more aggressive and wide appearance of the 285/70R17 tire size. For drivers who prefer a more understated appearance, the 275/70R18 tire size would be more suited.
Accessibility and Compatibility
Both tire sizes are typically offered, but you must make sure they are compliant with the manufacturer’s recommendations and your vehicle’s specs.
Over all, your decision between the 275/70R18 and 285/70R17 tire sizes will be based on your desired performance, compatibility with your vehicle, and driving preferences.
When selecting a choice, it is essential to review the tire manufacturer’s recommendations as well as the manufacturer’s requirements for your vehicle. When selecting a tire size, always put performance and safety first.
Frequently Asked Questions
Can I switch between 285/70R17 and 275/70R18 tire sizes on my vehicle without causing any issues?
While both tire sizes may fit certain vehicles, it’s essential to consult your vehicle’s manufacturer guidelines and tire manufacturer recommendations before making a switch.
Changing tire sizes can impact the speedometer, odometer, handling, and overall performance of your vehicle. Additionally, ensure that your rims are compatible with the new tire size.
Which tire size, 285/70R17 or 275/70R18, offers better off-road performance?
The 285/70R17 tire size typically offers better off-road performance due to its wider section width, which provides better traction on loose terrain.
However, individual tire models and their specific features can also play a significant role in off-road performance.
Will changing from 285/70R17 to 275/70R18 or vice versa improve my vehicle’s fuel efficiency?
The 275/70R18 tire size may offer slightly better fuel efficiency due to its smaller width and diameter compared to the 285/70R17 tire size.
However, the difference in fuel efficiency might not be significant, and other factors such as vehicle weight, driving habits, and tire pressure can also impact fuel consumption.
Are there any significant differences in load capacity and speed ratings between 285/70R17 and 275/70R18 tire sizes?
Generally, both tire sizes can have similar load capacities and speed ratings. However, these ratings may vary depending on the specific tire model and manufacturer.
Always check the load capacity and speed rating of the tire model you’re considering to ensure it meets your vehicle’s requirements and usage needs.
Final Thoughts on 285/70r17 vs 275/70r18 tire size
When deciding between 285/70R17 and 275/70R18 tire sizes, consider your driving preferences, vehicle compatibility, and desired performance. Both tire sizes have their advantages and drawbacks, and your choice will largely depend on your specific needs.
The 285/70R17 tire size offers better off-road performance due to its wider section width and more aggressive appearance. However, it may have marginally lower fuel efficiency compared to the 275/70R18 tire size.
On the other hand, the 275/70R18 tire size may provide slightly better fuel efficiency and a more subtle appearance. While its off-road capabilities are slightly less compared to the 285/70R17 size, it still performs well in most off-road conditions.
It’s essential to consult your vehicle’s manufacturer guidelines and tire manufacturer recommendations before making a decision. Changing tire sizes can impact your vehicle’s speedometer, odometer, handling, and overall performance. Make sure to prioritize safety and performance over aesthetics when choosing a tire size.
In conclusion, both 285/70R17 and 275/70R18 tire sizes have their unique characteristics, and the best choice will depend on your specific requirements and vehicle compatibility. Keep your driving conditions, preferences, and vehicle specifications in mind when deciding between these tire sizes.
