Tire Size 275/70r18 vs 265/70r18
While there will be slight changes in ground clearance, gas mileage, and other factors, the overall impact is minimal for most drivers. However, it’s important to understand the specific differences before making the switch.
- Slightly narrower tires may result in a minimally firmer ride on-road
- Fuel efficiency may improve slightly due to the smaller tire diameter
- Handling and responsiveness could see a minor improvement with narrower tires
- Speedometer will read slightly higher than actual speed, but the difference is negligible
- Ground clearance will be reduced by 0.28 inches (7 mm) for off-road use
- Narrower tires may provide marginally less traction in loose or muddy off-road conditions
Fitment Guide
According to the fitment guide, the diameter difference between 275/70R18 and 265/70R18 tires is -1.7%, which falls within the acceptable range of 3%.
This means that switching from 275/70R18 to 265/70R18 tires is generally recommended without requiring significant adaptations to your vehicle.
On-Road Impact
Switching to a slightly narrower tire can have some effects on your vehicle’s on-road performance. Here are some aspects to consider:
- Ride Comfort: The narrower 265/70R18 tires may slightly improve ride comfort, as they have a smaller contact patch with the road, potentially absorbing more vibrations.
- Fuel Efficiency: The narrower tires may provide a small improvement in fuel efficiency due to reduced rolling resistance.
- Handling: The narrower tires may slightly reduce the overall grip, especially during cornering or in wet conditions. However, this difference may be negligible for most drivers.
- Speedometer Accuracy: The speedometer will be slightly affected, with the actual speed being 0.33 mph (0.54 km/h) slower than the indicated speed at 20 mph (32.19 km/h). This difference is minimal and unlikely to cause any significant issues.
Off-Road Impact
If you use your vehicle for off-road adventures, switching to 265/70R18 tires may have some minor effects:
- Ground Clearance: The slightly smaller overall diameter of the 265/70R18 tires may result in a minor reduction in ground clearance (-0.28 inches or -7 mm). This difference is unlikely to significantly affect most off-road situations.
- Traction: The narrower tires may provide slightly less traction in soft terrain like mud or sand. However, the difference in width is relatively small, and the impact on overall off-road performance may be minimal.
- Durability: The durability and wear of the tires will depend more on the specific tire model and its construction rather than the size difference between 275/70R18 and 265/70R18.
What is the Difference Between 275/70R18 and 265/70R18?
The main difference between 275/70R18 and 265/70R18 tires is the width, with the 265/70R18 tires being 0.39 inches (10 mm) narrower. This 3.6% reduction in width is the most significant change between the two sizes.
Can I Use 265/70R18 Instead of 275/70R18?
Yes, you can use 265/70R18 tires instead of 275/70R18 tires. The overall diameter difference between the two sizes is -1.7%, which is within the acceptable range of 3% for proper fitment.
However, keep in mind that the narrower 265/70R18 tires may slightly affect ride comfort, handling, and off-road performance.
How Much Taller Is a 275/70R18 Tire Than a 265/70R18?
A 275/70R18 tire is approximately 0.55 inches (14 mm) taller than a 265/70R18 tire. The overall diameter of the 275/70R18 tire is 33.16 inches (842.2 mm), while the overall diameter of the 265/70R18 tire is 32.61 inches (828.2 mm).
How Much Wider is a 275/70R18 Tire Than a 265/70R18?
A 275/70R18 tire is 0.39 inches (10 mm) wider than a 265/70R18 tire. The width of the 275/70R18 tire is 10.83 inches (275 mm), whereas the width of the 265/70R18 tire is 10.43 inches (265 mm).
275/70r18 vs 265/70r18 Table
This table highlights the differences between 275/70R18 and 265/70R18 tires in terms of size and performance.
| Feature | 275/70R18 | 265/70R18 | Difference |
|---|---|---|---|
| Diameter inches (mm) | 33.16 (842.2) | 32.61 (828.2) | -0.55 (-14) -1.7% |
| Width inches (mm) | 10.83 (275) | 10.43 (265) | -0.39 (-10) -3.6% |
| Circumference inches (mm) | 104.17 (2645.85) | 102.44 (2601.87) | -1.73 (-43.98) -1.7% |
| Sidewall Height inches (mm) | 7.58 (192.5) | 7.3 (185.5) | -0.28 (-7) -3.6% |
| Revolutions per mile (km) | 608.25 (377.95) | 618.53 (384.34) | 10.28 (6.39) +1.7% |
| Speedo Reading | 20 mph | 19.67 mph | Actual Speed: 19.67 mph |
Our Observation
After analyzing the differences between 275/70R18 and 265/70R18 tires, we believe that switching to the narrower size is generally acceptable for most vehicles.
The -1.7% difference in overall diameter falls within the recommended ±3% range, meaning that the switch should not cause any significant fitment issues.
On-road, the narrower tires may slightly improve ride comfort and fuel efficiency while minimally affecting handling and speedometer accuracy.
Off-road, the minor reduction in ground clearance and traction may be noticeable in some situations, but the overall impact on performance is likely to be minimal.
Ultimately, the decision to switch from 275/70R18 to 265/70R18 tires depends on your specific needs and preferences. If you prioritize a slightly more comfortable ride and potential fuel savings, the switch may be beneficial.
However, if you require maximum traction and ground clearance for off-road adventures, sticking with the wider 275/70R18 tires may be the better choice.
Caitlin McCormack is a lead writer at Tiresizecompare.com and a trusted guide at AmarCalculator. With an extensive background in finance and mathematics, she simplifies complex calculations and delivers precise insights. Caitlin’s expertise ensures readers receive accurate and reliable information to make informed decisions. Her passion for numbers and dedication to clarity make her an invaluable resource for tire comparisons.
