275/55R20 tire size
A 275/55R20 tire is 275 mm wide with a 151.3 mm sidewall, 55% of the width, on a 20-inch rim, which puts the whole tire at 810.5 mm, or about 31.9 inches, tall. No model in our data leaves the factory on it, but it can replace the original size on 2 models within 3% of the height.
Overall height
810.5 mm
31.9 in
Sidewall
151.3 mm
55%
Circumference
2,546 mm
Revs per km
393
Actual dimensions of 275/55R20
| Section width | 275 mm (10.8 in) |
| Sidewall height | 151.3 mm (5.95 in) |
| Rim diameter | 20 in (508.0 mm) |
| Overall diameter | 810.5 mm (31.9 in) |
| Circumference | 2,546 mm |
| Revolutions per km | 393 |
| Inch notation (height x width) | 31.9x10.8R20 |
Worked out: sidewall 275 x 0.55 = 151.25 mm, rim 20 x 25.4 = 508 mm, overall 508 + (151.25 x 2) = 810.5 mm, circumference 3.1416 x 810.5 = 2,546 mm. One turn of the tire moves the car about 2.55 m, which is 393 turns per kilometer. New to sidewall codes? See how to read a tire size.
These are nominal figures from the standard formula. Real tires vary slightly by brand and squat a little under the weight of the car.
Cars fitted with 275/55R20 from the factory
No model sold in Thailand in our data leaves the factory on 275/55R20.
Cars that can switch to 275/55R20
These cars leave the factory on another size within 3% of the height of 275/55R20. Whether it fits still depends on rim width and wheel-well clearance.
Sizes that can replace 275/55R20
Sizes within ±3% of the overall height of 275/55R20. “At 100 km/h” is the real speed when the speedometer reads 100.
| Size | Height | Difference | At 100 km/h | Sidewall | Match | Compare |
|---|---|---|---|---|---|---|
| 285/50R20 | 793.0 mm | −17.5 mm (−2.16%) | 97.8 km/h | 142.5 mm | Within range | Compare |
| 255/55R20 | 788.5 mm | −22.0 mm (−2.71%) | 97.3 km/h | 140.3 mm | Within range | Compare |
- Keeping your wheels, the closest is 285/50R20 at 793.0 mm, −17.5 mm (−2.16%) from the original. With the speedometer on 100 km/h, the car would actually be doing about 97.8 km/h. Ground clearance drops by about 8.8 mm.
Buying 275/55R20 tires
Pickup sizes like this come in quieter, softer H/T tread for paved roads and A/T tread for gravel, which costs more and is noisier. Choose for the roads you actually drive.
Check the production date in the DOT code before paying.
Check current prices
Search by brand
Links open marketplace search results; prices change constantly and not every brand makes this size.
Load index and speed rating for 275/55R20
The code after the size on the sidewall, as in 275/55R20 113S, is the load index and speed symbol. The common ratings for this size:
| Version | Index | Per tire | Four tires |
|---|---|---|---|
| Standard load (SL) | 113 | 1,150 kg | 4,600 kg |
| Extra load (XL) | 117 | 1,285 kg | 5,140 kg |
The new tire's load index and speed symbol must be no lower than the door placard, and it only carries its rated load at the correct pressure.
Common speed symbols in this size
S
180 km/h
T
190 km/h
H
210 km/h
275/55R20 questions
How tall is a 275/55R20 tire?
About 31.9 inches, or 810.5 mm, from top to bottom before it carries weight. Each sidewall is 151.3 mm tall and the tire is 275 mm (10.8 in) wide.
Which cars use 275/55R20 tires?
No car in our data is fitted with 275/55R20 from the factory, but its height is close to the original size on Ford Everest and Ford Ranger, so it works as a replacement size.
Can I fit 285/50R20 instead of 275/55R20?
Size-wise, yes: the height differs by −2.16% (−17.5 mm), so an indicated 100 km/h is really about 97.8 km/h. The tread is 10 mm wider. Check rim width and load index first.
How much weight can a 275/55R20 tire carry?
Most standard-load versions carry load index 113: 1,150 kg per tire, 4,600 kg across four. XL versions are rated 117, or 1,285 kg per tire. Look for the number after the size on the sidewall, as in 275/55R20 113S.
Other 20-inch sizes
To compare other sizes yourself, use the tire size calculator; changing rim size, try plus/minus sizing; and see speedometer error by speed.