Tire Size 285/55r20 vs 275/60r20
The main difference between the two tire sizes is the width and sidewall height. The 285/55r20 tire is 10 mm wider and has a 0.3 inches shorter sidewall than the 275/60r20 tire.
285/55r20 vs 275/60r20
| 285 55R20 | 275 60R20 | Difference |
|---|---|---|
| Tire Height 32.34″ | Tire Height 32.99″ | 0.65 inch |
| Tread Width 11.22″ | Tread Width 10.83″ | -0.39 inch |
| Sidewall Height 6.17″ | Sidewall Height 6.5″ | 0.32 inch |
| Circumference 101.61″ | Circumference 103.65″ | 2.04 inch |
| Revs Per Mile 623.58 | Revs Per Mile 611.3 | -12.28 Mile |
| Speedometer Reading 20 mph | Speedometer Reading 20.4 mph | 0.4 mph |
| Radial Tire | Radial Tire | No Difference |
| Rim Size 20″ | Rim Size 20″ | No Difference |
Fitment Guide
The new tires should be within 3% of the original size’s overall diameter when replacing tires. Going beyond this can cause issues like rubbing or require modifications like a lift kit to accommodate the new size.
The 285/55R20 and 275/60R20 are within 2% of each other in overall diameter, so fitment is not a major concern.
Ground Clearance
The 275/60R20, with its 0.3-inch taller sidewall, provides slightly more ground clearance than the 285/55R20. This can help prevent scraping over obstacles and is advantageous for off-road driving. However, the larger diameter causes a lower speedometer reading.
Gas Mileage
The 285/55R20’s narrower width and shorter sidewall reduce rolling resistance and rotational mass compared to the 275/60R20. This improves fuel efficiency and is useful for daily driving and long trips.
Ride Comfort
The 275/60R20’s extra sidewall cushioning absorbs bumps and cracks better than the 285/55R20. Its more flexible sidewall dampens road impacts, providing a smoother ride over uneven pavement. However, the difference is minor.
Aesthetics
The 275/60R20’s taller sidewall visually gives a subtly “stretched” look compared to the 285/55R20’s shorter sidewall. Subjectively, the stretched aesthetic suits trucks and SUVs well, while lower profiles suit sports cars.
Handling & Stability
The 285/55R20’s shorter sidewall enhances responsiveness and precision on the pavement. The 275/60R20’s extra flex slightly reduces handling sharpness but provides stability, especially off-road. Both deliver responsive, stable handling overall.
Noise & Vibration
The 285/55R20’s stiffer sidewall transmits more road noise and vibration into the cabin. The 275/60R20’s flexible sidewall absorbs more noise and vibration. However, the differences are minor, and both tires are quiet and comfortable.
Durability & Wear
The narrower 285/55R20 should exhibit more even treadwear and potentially longer life. The heavier 275/60R20 puts more stress on components, but its larger air volume helps absorb impacts.
Adverse Conditions
In snow, the 285/55R20’s narrower tread can cut through to the pavement more easily. The 275/60R20’s larger footprint provides better traction for off-road and mud. Both perform well overall in adverse conditions.
Speedometer Reading
At 20 mph true speed, the 285/55R20 reads 20.4 mph on the speedometer. The 275/60R20 reads 20 mph at the same actual speed due to its larger diameter. The difference between the tire sizes is 0.4 mph on the speedometer.
What Does 275 60r20 Tire Mean?
The 275 60r20 tire size means that the tire is 275 mm wide, has a 60-series aspect ratio, and is 20 inches in diameter. This size is standard on SUVs and trucks. A wider tire will provide more traction but may sacrifice some handling.
A narrower tire may improve handling but may provide less traction. Considering these factors is essential when choosing the right tire size for your vehicle.
Our Observation
The 285/55R20 is best suited for responsiveness and fuel efficiency thanks to its shorter sidewall and narrower width. The 275/60R20 provides a smoother ride and better ground clearance from its taller sidewall, making it preferable for rugged terrain.
For most drivers, the difference in real-world performance is minor. We recommend the 275/60R20 for its well-rounded on- and off-road capabilities. The extra cushioning and clearance make it versatile while still delivering responsive handling for daily 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.
