Tire Size 285/70r17 vs 255/80r17
The main difference between 285/70r17 and 255/80r17 tires is their width. 285/70r17 tires are 30mm wider than 255/80r17 tires. This difference in width can significantly impact the performance and handling of your vehicle.
| / | R |
| / | R |
| Parameter | 235/35 R18 | 205/40 R18 | Differ. |
|---|---|---|---|
| Tire Height | |||
| Section Width | |||
| Circumference | |||
| Sidewall Height | |||
| Revolutions | |||
| Rim Size |
Fitment Guide
The overall diameters of these tires are very close, with the 255/80r17 being just 1.1% larger. This small difference means both tires can be installed as replacements without issues.
According to industry guidelines, replacement tires should be within 3% of the original size to avoid clearance problems or speedometer errors.
At just 1.1% difference, both the 285/70r17 and 255/80r17 will fit most vehicles designed for either size.
Ground Clearance
The 1.1% larger diameter of the 255/80r17 provides 9mm more ground clearance than the 285/70r17. This slightly higher clearance benefits off-road driving, allowing the tires to clear rocks and obstacles more easily.
However, the minimal 0.35-inch difference will not significantly impact most conditions. Those needing maximum clearance may still prefer the 255/80r17.
Gas Mileage
With a narrower tread and smaller contact patch, the 255/80R17 offers slightly better gas mileage compared to the wider 285/70R17.
The narrower tire has lower rolling resistance, which reduces fuel consumption. This makes the 255/80R17 an intelligent choice for fuel economy-focused drivers.
Ride Comfort
The taller sidewall of the 255/80R17 absorbs road imperfections better than the lower profile 285/70R17. With 8.03 inches of sidewall, the 255/80R17 runs softer and smoother over bumps and cracks.
This cushier ride quality improves comfort on rough roads. The 285/70R17’s shorter 7.85-inch sidewall transmits more harshness into the cabin.
Aesthetics
Visually, the 285/70R17 looks bolder and more aggressive due to its wider tread span. Vehicles like trucks and SUVs often suit the wider stance.
The narrower 255/80R17 has a more low-profile appearance. For some vehicles, the stretched look may be more aesthetically fitting. Overall, the difference is minor and subjective.
Handling & Stability
The 285/70R17’s wider tread provides more contact with the road, enhancing grip and stability. But the lower profile sidewall is also stiffer, reducing flex for sharper handling and steering response.
In contrast, the taller 255/80R17 sidewall allows more flex, slightly compromising handling precision. Both offer stable performance for regular driving.
Noise & Vibration
With increased air volume inside the tire, the taller 255/80R17 sidewall absorbs road noise and vibrations better. Its extra flex dampens harshness from the road.
The 285/70R17 transmits more noise and vibration through its shorter, stiffer sidewall. However, both tires are reasonably quiet and smooth for daily use.
Durability & Wear
The narrower 255/80R17 concentrates force on a smaller contact patch, which can lead to faster wear in the center of the tread.
The wider 285/70R17 distributes wear more evenly across its broader tread area, potentially increasing tread life. Both tires feature durable construction, but the wider width has a slight advantage.
Adverse Conditions
Performance in rain, snow, and off-road conditions is very similar. The 255/80R17’s extra ground clearance provides a slight advantage, while the 285/70R17’s shorter sidewall makes it a bit more responsive. But both handle adverse conditions well.
Speedometer Difference
At the same actual speed, the 255/80R17 displays a reading 0.66 mph lower on the speedometer compared to the 285/70R17 due to its 1.1% larger diameter. This minor difference has little impact on real-world driving.
285/70r17 vs 255/80r17
Compare the tire sizes 285/70r17 and 255/80r17 using the table below.
Our Observation
Based on the comparisons, the 255/80R17 is the better choice for fuel efficiency and ride comfort thanks to its narrower width and taller sidewall.
Meanwhile, the 285/70R17 is preferable for handling, stability, and tread life due to its wider footprint and lower profile.
For most drivers seeking a balance of comfort, performance, and value, we recommend the 285/70R17. Its broader tread provides better grip and stability, while the shorter sidewall height maintains responsive handling.
The wider width also resists uneven wear. While ride comfort suffers slightly, the 285/70R17 offers versatile capabilities for everyday driving.
Meet Caitlin McCormack, a Tire Size Expert and Blogger Passionate About Everything Related to Tires. With Years of Experience in the Tire Industry, Caitlin Has Become an Expert in Tire Sizes and Their Impact on Vehicle Performance.
