285/50R20 tire size
A 285/50R20 tire is 285 mm wide with a 142.5 mm sidewall, 50% of the width, on a 20-inch rim, which puts the whole tire at 793.0 mm, or about 31.2 inches, tall. No model in our data leaves the factory on it, but it can replace the original size on 11 models within 3% of the height.
Overall height
793.0 mm
31.2 in
Sidewall
142.5 mm
50%
Circumference
2,491 mm
Revs per km
401
Actual dimensions of 285/50R20
| Section width | 285 mm (11.2 in) |
| Sidewall height | 142.5 mm (5.61 in) |
| Rim diameter | 20 in (508.0 mm) |
| Overall diameter | 793.0 mm (31.2 in) |
| Circumference | 2,491 mm |
| Revolutions per km | 401 |
| Inch notation (height x width) | 31.2x11.2R20 |
Worked out: sidewall 285 x 0.5 = 142.5 mm, rim 20 x 25.4 = 508 mm, overall 508 + (142.5 x 2) = 793.0 mm, circumference 3.1416 x 793.0 = 2,491 mm. One turn of the tire moves the car about 2.49 m, which is 401 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 285/50R20 from the factory
No model sold in Thailand in our data leaves the factory on 285/50R20.
Cars that can switch to 285/50R20
These cars leave the factory on another size within 3% of the height of 285/50R20. Whether it fits still depends on rim width and wheel-well clearance.
| Model | Factory size | Height difference | Wheel |
|---|---|---|---|
| Ford Everest2022–present | 255/55R20 | +0.57% | Same wheel |
| Isuzu MU-X2021–present | 265/50R20 | +2.59% | Same wheel |
| Ford Ranger2022–present | 255/65R18 | +0.55% | Needs 20-inch wheels |
| Toyota Fortuner2015–present | 265/60R18 | +2.30% | Needs 20-inch wheels |
| Toyota Hilux Revo2015–2025 | 265/60R18 | +2.30% | Needs 20-inch wheels |
| Toyota Hilux TRAVO2025–present | 265/60R18 | +2.30% | Needs 20-inch wheels |
| Isuzu D-Max2020–present | 265/60R18 | +2.30% | Needs 20-inch wheels |
| Mitsubishi Pajero Sport2015–present | 265/60R18 | +2.30% | Needs 20-inch wheels |
| Mitsubishi Triton2024–present | 265/60R18 | +2.30% | Needs 20-inch wheels |
| Mitsubishi Triton2015–2023 | 265/60R18 | +2.30% | Needs 20-inch wheels |
| Ford Ranger2015–2021 | 265/60R18 | +2.30% | Needs 20-inch wheels |
Sizes that can replace 285/50R20
Sizes within ±3% of the overall height of 285/50R20. “At 100 km/h” is the real speed when the speedometer reads 100.
| Size | Height | Difference | At 100 km/h | Sidewall | Match | Compare |
|---|---|---|---|---|---|---|
| 255/55R20 | 788.5 mm | −4.5 mm (−0.57%) | 99.4 km/h | 140.3 mm | Close | Compare |
| 275/50R20 | 783.0 mm | −10.0 mm (−1.26%) | 98.7 km/h | 137.5 mm | Close | Compare |
| 275/45R21 | 780.9 mm | −12.1 mm (−1.53%) | 98.5 km/h | 123.8 mm | Close | Compare |
| 275/55R20 | 810.5 mm | +17.5 mm (+2.21%) | 102.2 km/h | 151.3 mm | Within range | Compare |
| 265/50R20 | 773.0 mm | −20.0 mm (−2.52%) | 97.5 km/h | 132.5 mm | Within range | Compare |
- Keeping your wheels, the closest is 255/55R20 at 788.5 mm, −4.5 mm (−0.57%) from the original. With the speedometer on 100 km/h, the car would actually be doing about 99.4 km/h. Ground clearance drops by about 2.3 mm.
- Moving up to 21-inch wheels, the closest height match is 275/45R21 (−1.53%), with the sidewall dropping from 142.5 mm to 123.8 mm.
- A larger or wider tire also changes acceleration, fuel use and steering weight, so look beyond the percentage.
Buying 285/50R20 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 285/50R20
The code after the size on the sidewall, as in 285/50R20 112S, is the load index and speed symbol. The common ratings for this size:
| Version | Index | Per tire | Four tires |
|---|---|---|---|
| Standard load (SL) | 112 | 1,120 kg | 4,480 kg |
| Extra load (XL) | 116 | 1,250 kg | 5,000 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
285/50R20 questions
How tall is a 285/50R20 tire?
About 31.2 inches, or 793.0 mm, from top to bottom before it carries weight. Each sidewall is 142.5 mm tall and the tire is 285 mm (11.2 in) wide.
Which cars use 285/50R20 tires?
No car in our data is fitted with 285/50R20 from the factory, but its height is close to the original size on Ford Everest, Isuzu MU-X, Ford Ranger, Toyota Fortuner and Toyota Hilux Revo, so it works as a replacement size.
Can I fit 255/55R20 instead of 285/50R20?
Size-wise, yes: the height differs by −0.57% (−4.5 mm), so an indicated 100 km/h is really about 99.4 km/h. The tread is 30 mm narrower. Check rim width and load index first.
How much weight can a 285/50R20 tire carry?
Most standard-load versions carry load index 112: 1,120 kg per tire, 4,480 kg across four. XL versions are rated 116, or 1,250 kg per tire. Look for the number after the size on the sidewall, as in 285/50R20 112S.
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.