235/65R18 tire size
A 235/65R18 tire is 235 mm wide with a 152.8 mm sidewall, 65% of the width, on a 18-inch rim, which puts the whole tire at 762.7 mm, or about 30.0 inches, tall. No model in our data leaves the factory on it, but it can replace the original size on 14 models within 3% of the height.
Overall height
762.7 mm
30.0 in
Sidewall
152.8 mm
65%
Circumference
2,396 mm
Revs per km
417
Actual dimensions of 235/65R18
| Section width | 235 mm (9.3 in) |
| Sidewall height | 152.8 mm (6.01 in) |
| Rim diameter | 18 in (457.2 mm) |
| Overall diameter | 762.7 mm (30.0 in) |
| Circumference | 2,396 mm |
| Revolutions per km | 417 |
| Inch notation (height x width) | 30.0x9.3R18 |
Worked out: sidewall 235 x 0.65 = 152.75 mm, rim 18 x 25.4 = 457.2 mm, overall 457.2 + (152.75 x 2) = 762.7 mm, circumference 3.1416 x 762.7 = 2,396 mm. One turn of the tire moves the car about 2.40 m, which is 417 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 235/65R18 from the factory
No model sold in Thailand in our data leaves the factory on 235/65R18.
Cars that can switch to 235/65R18
These cars leave the factory on another size within 3% of the height of 235/65R18. Whether it fits still depends on rim width and wheel-well clearance.
| Model | Factory size | Height difference | Wheel |
|---|---|---|---|
| Nissan Navara2021–present | 255/60R18 | −0.07% | Same wheel |
| Nissan NP300 Navara2014–2020 | 255/60R18 | −0.07% | Same wheel |
| MG ExtenderCurrent model | 255/60R18 | −0.07% | Same wheel |
| Toyota Fortuner2015–present | 265/60R18 | −1.61% | Same wheel |
| Toyota Hilux Revo2015–2025 | 265/60R18 | −1.61% | Same wheel |
| Toyota Hilux TRAVO2025–present | 265/60R18 | −1.61% | Same wheel |
| Isuzu D-Max2020–present | 265/60R18 | −1.61% | Same wheel |
| Isuzu MU-X2021–present | 265/60R18 | −1.61% | Same wheel |
| Mitsubishi Pajero Sport2015–present | 265/60R18 | −1.61% | Same wheel |
| Mitsubishi Triton2024–present | 265/60R18 | −1.61% | Same wheel |
| Mitsubishi Triton2015–2023 | 265/60R18 | −1.61% | Same wheel |
| Ford Ranger2015–2021 | 265/60R18 | −1.61% | Same wheel |
Showing the 12 closest of 14 models.
Sizes that can replace 235/65R18
Sizes within ±3% of the overall height of 235/65R18. “At 100 km/h” is the real speed when the speedometer reads 100.
| Size | Height | Difference | At 100 km/h | Sidewall | Match | Compare |
|---|---|---|---|---|---|---|
| 255/50R20 | 763.0 mm | +0.3 mm (+0.04%) | 100.0 km/h | 127.5 mm | Very close | Compare |
| 255/55R19 | 763.1 mm | +0.4 mm (+0.05%) | 100.1 km/h | 140.3 mm | Very close | Compare |
| 255/60R18 | 763.2 mm | +0.5 mm (+0.07%) | 100.1 km/h | 153.0 mm | Very close | Compare |
| 255/65R17 | 763.3 mm | +0.6 mm (+0.08%) | 100.1 km/h | 165.8 mm | Very close | Compare |
| 265/50R20 | 773.0 mm | +10.3 mm (+1.35%) | 101.4 km/h | 132.5 mm | Close | Compare |
| 245/55R19 | 752.1 mm | −10.6 mm (−1.39%) | 98.6 km/h | 134.8 mm | Close | Compare |
| 245/60R18 | 751.2 mm | −11.5 mm (−1.51%) | 98.5 km/h | 147.0 mm | Close | Compare |
| 245/70R17 | 774.8 mm | +12.1 mm (+1.59%) | 101.6 km/h | 171.5 mm | Close | Compare |
- Keeping your wheels, the closest is 255/60R18 at 763.2 mm, +0.5 mm (+0.07%) from the original. With the speedometer on 100 km/h, the car would actually be doing about 100.1 km/h.
- Moving up to 19-inch wheels, the closest height match is 255/55R19 (+0.05%), with the sidewall dropping from 152.8 mm to 140.3 mm.
- Going down to 17-inch wheels, 255/65R17 (+0.08%) is the closest match and raises the sidewall to 165.8 mm.
- A larger or wider tire also changes acceleration, fuel use and steering weight, so look beyond the percentage.
Buying 235/65R18 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 235/65R18
The code after the size on the sidewall, as in 235/65R18 106S, is the load index and speed symbol. The common ratings for this size:
| Version | Index | Per tire | Four tires |
|---|---|---|---|
| Standard load (SL) | 106 | 950 kg | 3,800 kg |
| Extra load (XL) | 110 | 1,060 kg | 4,240 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
235/65R18 questions
How tall is a 235/65R18 tire?
About 30.0 inches, or 762.7 mm, from top to bottom before it carries weight. Each sidewall is 152.8 mm tall and the tire is 235 mm (9.3 in) wide.
Which cars use 235/65R18 tires?
No car in our data is fitted with 235/65R18 from the factory, but its height is close to the original size on Nissan Navara, Nissan NP300 Navara, MG Extender, Toyota Fortuner and Toyota Hilux Revo, so it works as a replacement size.
Can I fit 255/60R18 instead of 235/65R18?
Size-wise, yes: the height differs by +0.07% (+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 235/65R18 tire carry?
Most standard-load versions carry load index 106: 950 kg per tire, 3,800 kg across four. XL versions are rated 110, or 1,060 kg per tire. Look for the number after the size on the sidewall, as in 235/65R18 106S.
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.