255/70R17 tire size
A 255/70R17 tire is 255 mm wide with a 178.5 mm sidewall, 70% of the width, on a 17-inch rim, which puts the whole tire at 788.8 mm, or about 31.1 inches, tall. Our data lists 1 models fitted with it from the factory, mostly pickups.
Overall height
788.8 mm
31.1 in
Sidewall
178.5 mm
70%
Circumference
2,478 mm
Revs per km
404
Actual dimensions of 255/70R17
| Section width | 255 mm (10.0 in) |
| Sidewall height | 178.5 mm (7.03 in) |
| Rim diameter | 17 in (431.8 mm) |
| Overall diameter | 788.8 mm (31.1 in) |
| Circumference | 2,478 mm |
| Revolutions per km | 404 |
| Inch notation (height x width) | 31.1x10.0R17 |
Worked out: sidewall 255 x 0.7 = 178.5 mm, rim 17 x 25.4 = 431.8 mm, overall 431.8 + (178.5 x 2) = 788.8 mm, circumference 3.1416 x 788.8 = 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 255/70R17 from the factory
Models whose Thai-market specification lists 255/70R17; the source column links to the spec we checked.
| Model | Years | Grades | Source |
|---|---|---|---|
| Ford Ranger | 2022–present | XLS, XLT | headlightmag.com |
Cars that can switch to 255/70R17
These cars leave the factory on another size within 3% of the height of 255/70R17. Whether it fits still depends on rim width and wheel-well clearance.
| Model | Factory size | Height difference | Wheel |
|---|---|---|---|
| Toyota Fortuner2015–present | 265/65R17 | +1.61% | Same wheel |
| Toyota Hilux Revo2015–2025 | 265/65R17 | +1.61% | Same wheel |
| Toyota Hilux TRAVO2025–present | 265/65R17 | +1.61% | Same wheel |
| Mitsubishi Triton2024–present | 265/65R17 | +1.61% | Same wheel |
| Isuzu D-Max2020–present | 265/60R18 | +1.75% | Needs 17-inch wheels |
| Isuzu MU-X2021–present | 265/60R18 | +1.75% | Needs 17-inch wheels |
| Mitsubishi Triton2015–2023 | 265/60R18 | +1.75% | Needs 17-inch wheels |
| Ford Ranger2015–2021 | 265/60R18 | +1.75% | Needs 17-inch wheels |
Sizes that can replace 255/70R17
Sizes within ±3% of the overall height of 255/70R17. “At 100 km/h” is the real speed when the speedometer reads 100.
| Size | Height | Difference | At 100 km/h | Sidewall | Match | Compare |
|---|---|---|---|---|---|---|
| 255/65R18 | 788.7 mm | −0.1 mm (−0.01%) | 100.0 km/h | 165.8 mm | Very close | Compare |
| 275/65R17 | 789.3 mm | +0.5 mm (+0.06%) | 100.1 km/h | 178.8 mm | Very close | Compare |
| 275/60R18 | 787.2 mm | −1.6 mm (−0.20%) | 99.8 km/h | 165.0 mm | Very close | Compare |
| 285/60R18 | 799.2 mm | +10.4 mm (+1.32%) | 101.3 km/h | 171.0 mm | Close | Compare |
| 265/70R16 | 777.4 mm | −11.4 mm (−1.45%) | 98.6 km/h | 185.5 mm | Close | Compare |
| 265/65R17 | 776.3 mm | −12.5 mm (−1.58%) | 98.4 km/h | 172.3 mm | Close | Compare |
| 265/65R18 | 801.7 mm | +12.9 mm (+1.64%) | 101.6 km/h | 172.3 mm | Close | Compare |
| 265/60R18 | 775.2 mm | −13.6 mm (−1.72%) | 98.3 km/h | 159.0 mm | Close | Compare |
- Keeping your wheels, the closest is 275/65R17 at 789.3 mm, +0.5 mm (+0.06%) from the original. With the speedometer on 100 km/h, the car would actually be doing about 100.1 km/h.
- Moving up to 18-inch wheels, the closest height match is 255/65R18 (−0.01%), with the sidewall dropping from 178.5 mm to 165.8 mm.
- Going down to 16-inch wheels, 265/70R16 (−1.45%) is the closest match and raises the sidewall to 185.5 mm.
- A larger or wider tire also changes acceleration, fuel use and steering weight, so look beyond the percentage.
Buying 255/70R17 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 255/70R17
The code after the size on the sidewall, as in 255/70R17 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 |
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
255/70R17 questions
How tall is a 255/70R17 tire?
About 31.1 inches, or 788.8 mm, from top to bottom before it carries weight. Each sidewall is 178.5 mm tall and the tire is 255 mm (10.0 in) wide.
Which cars use 255/70R17 tires?
From Thai-market specifications, 255/70R17 comes on Ford Ranger.
Can I fit 275/65R17 instead of 255/70R17?
Size-wise, yes: the height differs by +0.06% (+0.5 mm), so an indicated 100 km/h is really about 100.1 km/h. The tread is 20 mm wider. Check rim width and load index first.
How much weight can a 255/70R17 tire carry?
Most standard-load versions carry load index 112: 1,120 kg per tire, 4,480 kg across four. Look for the number after the size on the sidewall, as in 255/70R17 112S.
Other 17-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.