255/65R18 tire size
A 255/65R18 tire is 255 mm wide with a 165.8 mm sidewall, 65% of the width, on a 18-inch rim, which puts the whole tire at 788.7 mm, or about 31.1 inches, tall. Our data lists 2 models fitted with it from the factory, mostly PPV SUVs and pickups.
Overall height
788.7 mm
31.1 in
Sidewall
165.8 mm
65%
Circumference
2,478 mm
Revs per km
404
Actual dimensions of 255/65R18
| Section width | 255 mm (10.0 in) |
| Sidewall height | 165.8 mm (6.53 in) |
| Rim diameter | 18 in (457.2 mm) |
| Overall diameter | 788.7 mm (31.1 in) |
| Circumference | 2,478 mm |
| Revolutions per km | 404 |
| Inch notation (height x width) | 31.1x10.0R18 |
Worked out: sidewall 255 x 0.65 = 165.75 mm, rim 18 x 25.4 = 457.2 mm, overall 457.2 + (165.75 x 2) = 788.7 mm, circumference 3.1416 x 788.7 = 2,478 mm. One turn of the tire moves the car about 2.48 m, which is 404 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 255/65R18 from the factory
Models whose Thai-market specification lists 255/65R18; the source column links to the spec we checked.
| Model | Years | Grades | Source |
|---|---|---|---|
| Ford Everest | 2022–present | Trend, Active | headlightmag.com |
| Ford Ranger | 2022–present | Wildtrak | headlightmag.com |
Cars that can switch to 255/65R18
These cars leave the factory on another size within 3% of the height of 255/65R18. Whether it fits still depends on rim width and wheel-well clearance.
| Model | Factory size | Height difference | Wheel |
|---|---|---|---|
| Toyota Fortuner2015–present | 265/60R18 | +1.74% | Same wheel |
| Toyota Hilux Revo2015–2025 | 265/60R18 | +1.74% | Same wheel |
| Toyota Hilux TRAVO2025–present | 265/60R18 | +1.74% | Same wheel |
| Isuzu D-Max2020–present | 265/60R18 | +1.74% | Same wheel |
| Isuzu MU-X2021–present | 265/60R18 | +1.74% | Same wheel |
| Mitsubishi Pajero Sport2015–present | 265/60R18 | +1.74% | Same wheel |
| Mitsubishi Triton2024–present | 265/60R18 | +1.74% | Same wheel |
| Mitsubishi Triton2015–2023 | 265/60R18 | +1.74% | Same wheel |
| Ford Ranger2015–2021 | 265/60R18 | +1.74% | Same wheel |
Sizes that can replace 255/65R18
Sizes within ±3% of the overall height of 255/65R18. “At 100 km/h” is the real speed when the speedometer reads 100.
| Size | Height | Difference | At 100 km/h | Sidewall | Match | Compare |
|---|---|---|---|---|---|---|
| 255/70R17 | 788.8 mm | +0.1 mm (+0.01%) | 100.0 km/h | 178.5 mm | Very close | Compare |
| 255/55R20 | 788.5 mm | −0.2 mm (−0.03%) | 100.0 km/h | 140.3 mm | Very close | Compare |
| 275/65R17 | 789.3 mm | +0.6 mm (+0.08%) | 100.1 km/h | 178.8 mm | Very close | Compare |
| 275/60R18 | 787.2 mm | −1.5 mm (−0.19%) | 99.8 km/h | 165.0 mm | Very close | Compare |
| 285/50R20 | 793.0 mm | +4.3 mm (+0.55%) | 100.5 km/h | 142.5 mm | Close | Compare |
| 275/50R20 | 783.0 mm | −5.7 mm (−0.72%) | 99.3 km/h | 137.5 mm | Close | Compare |
| 285/60R18 | 799.2 mm | +10.5 mm (+1.33%) | 101.3 km/h | 171.0 mm | Close | Compare |
| 265/65R17 | 776.3 mm | −12.4 mm (−1.57%) | 98.4 km/h | 172.3 mm | Close | Compare |
- Keeping your wheels, the closest is 275/60R18 at 787.2 mm, −1.5 mm (−0.19%) from the original. With the speedometer on 100 km/h, the car would actually be doing about 99.8 km/h. Ground clearance drops by about 0.8 mm.
- Going down to 17-inch wheels, 255/70R17 (+0.01%) is the closest match and raises the sidewall to 178.5 mm.
Buying 255/65R18 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 255/65R18
The code after the size on the sidewall, as in 255/65R18 111S, is the load index and speed symbol. The common ratings for this size:
| Version | Index | Per tire | Four tires |
|---|---|---|---|
| Standard load (SL) | 111 | 1,090 kg | 4,360 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
255/65R18 questions
How tall is a 255/65R18 tire?
About 31.1 inches, or 788.7 mm, from top to bottom before it carries weight. Each sidewall is 165.8 mm tall and the tire is 255 mm (10.0 in) wide.
Which cars use 255/65R18 tires?
From Thai-market specifications, 255/65R18 comes on Ford Everest and Ford Ranger.
Can I fit 275/60R18 instead of 255/65R18?
Size-wise, yes: the height differs by −0.19% (−1.5 mm), so an indicated 100 km/h is really about 99.8 km/h. The tread is 20 mm wider. Check rim width and load index first.
How much weight can a 255/65R18 tire carry?
Most standard-load versions carry load index 111: 1,090 kg per tire, 4,360 kg across four. Look for the number after the size on the sidewall, as in 255/65R18 111S.
Other 18-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.