215/55R18 tire size
A 215/55R18 tire is 215 mm wide with a 118.3 mm sidewall, 55% of the width, on a 18-inch rim, which puts the whole tire at 693.7 mm, or about 27.3 inches, tall. Our data lists 3 models fitted with it from the factory, mostly SUVs and crossovers.
Overall height
693.7 mm
27.3 in
Sidewall
118.3 mm
55%
Circumference
2,179 mm
Revs per km
459
Actual dimensions of 215/55R18
| Section width | 215 mm (8.5 in) |
| Sidewall height | 118.3 mm (4.66 in) |
| Rim diameter | 18 in (457.2 mm) |
| Overall diameter | 693.7 mm (27.3 in) |
| Circumference | 2,179 mm |
| Revolutions per km | 459 |
| Inch notation (height x width) | 27.3x8.5R18 |
Worked out: sidewall 215 x 0.55 = 118.25 mm, rim 18 x 25.4 = 457.2 mm, overall 457.2 + (118.25 x 2) = 693.7 mm, circumference 3.1416 x 693.7 = 2,179 mm. One turn of the tire moves the car about 2.18 m, which is 459 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 215/55R18 from the factory
Models whose Thai-market specification lists 215/55R18; the source column links to the spec we checked.
| Model | Years | Grades | Source |
|---|---|---|---|
| Toyota Yaris Cross HEV | 2023–present | Premium Luxury | headlightmag.com |
| Mazda CX-30 | 2020–present | 18-inch wheel grades | mazda.co.th |
| BYD ATTO 3 | 2022–present | Extended Range (2022–2023) | headlightmag.com |
Cars that can switch to 215/55R18
These cars leave the factory on another size within 3% of the height of 215/55R18. Whether it fits still depends on rim width and wheel-well clearance.
| Model | Factory size | Height difference | Wheel |
|---|---|---|---|
| MG HS / HS PHEVCurrent model | 235/50R18 | +0.22% | Same wheel |
| Toyota C-HR2018–2023 | 225/50R18 | +1.69% | Same wheel |
| Toyota Corolla Cross2020–present | 225/50R18 | +1.69% | Same wheel |
| Toyota Innova Zenix HEV2023–present | 225/50R18 | +1.69% | Same wheel |
| Honda e:N12024–present | 225/50R18 | +1.69% | Same wheel |
| Honda HR-V e:HEV2022–present | 225/50R18 | +1.69% | Same wheel |
| Mitsubishi Xforce HEVCurrent model | 225/50R18 | +1.69% | Same wheel |
| BYD Seal2023–present | 225/50R18 | +1.69% | Same wheel |
Sizes that can replace 215/55R18
Sizes within ±3% of the overall height of 215/55R18. “At 100 km/h” is the real speed when the speedometer reads 100.
| Size | Height | Difference | At 100 km/h | Sidewall | Match | Compare |
|---|---|---|---|---|---|---|
| 235/45R19 | 694.1 mm | +0.4 mm (+0.06%) | 100.1 km/h | 105.8 mm | Very close | Compare |
| 235/50R18 | 692.2 mm | −1.5 mm (−0.22%) | 99.8 km/h | 117.5 mm | Very close | Compare |
| 235/55R17 | 690.3 mm | −3.4 mm (−0.49%) | 99.5 km/h | 129.3 mm | Very close | Compare |
| 215/60R17 | 689.8 mm | −3.9 mm (−0.56%) | 99.4 km/h | 129.0 mm | Close | Compare |
| 225/60R17 | 701.8 mm | +8.1 mm (+1.17%) | 101.2 km/h | 135.0 mm | Close | Compare |
| 245/50R18 | 702.2 mm | +8.5 mm (+1.23%) | 101.2 km/h | 122.5 mm | Close | Compare |
| 225/45R19 | 685.1 mm | −8.6 mm (−1.24%) | 98.8 km/h | 101.3 mm | Close | Compare |
| 245/45R19 | 703.1 mm | +9.4 mm (+1.36%) | 101.4 km/h | 110.3 mm | Close | Compare |
- Keeping your wheels, the closest is 235/50R18 at 692.2 mm, −1.5 mm (−0.22%) 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.
- Moving up to 19-inch wheels, the closest height match is 235/45R19 (+0.06%), with the sidewall dropping from 118.3 mm to 105.8 mm.
- Going down to 17-inch wheels, 235/55R17 (−0.49%) is the closest match and raises the sidewall to 129.3 mm.
- A larger or wider tire also changes acceleration, fuel use and steering weight, so look beyond the percentage.
Buying 215/55R18 tires
Passenger tires in this size come in eco, comfort and sport lines. Japanese and European brands usually cost more than Asian ones, and the difference shows in noise, wet braking and tread life.
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 215/55R18
The code after the size on the sidewall, as in 215/55R18 95H, is the load index and speed symbol. The common ratings for this size:
| Version | Index | Per tire | Four tires |
|---|---|---|---|
| Standard load (SL) | 95 | 690 kg | 2,760 kg |
| Extra load (XL) | 99 | 775 kg | 3,100 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
H
210 km/h
V
240 km/h
215/55R18 questions
How tall is a 215/55R18 tire?
About 27.3 inches, or 693.7 mm, from top to bottom before it carries weight. Each sidewall is 118.3 mm tall and the tire is 215 mm (8.5 in) wide.
Which cars use 215/55R18 tires?
From Thai-market specifications, 215/55R18 comes on Toyota Yaris Cross HEV, Mazda CX-30 and BYD ATTO 3.
Can I fit 235/50R18 instead of 215/55R18?
Size-wise, yes: the height differs by −0.22% (−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 215/55R18 tire carry?
Most standard-load versions carry load index 95: 690 kg per tire, 2,760 kg across four. XL versions are rated 99, or 775 kg per tire. Look for the number after the size on the sidewall, as in 215/55R18 95H.
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.