235/55R18 tire size
A 235/55R18 tire is 28.18 inches (715.7 mm) tall, 9.25 in (235 mm) wide and fits a 18-inch wheel. In inch notation it is roughly a 28.2x9.3R18 — a "28-inch" tire.
| Overall diameter | 28.18 in | 715.7 mm |
|---|---|---|
| Section width | 9.25 in | 235 mm |
| Sidewall height | 5.09 in | 129.3 mm |
| Circumference | 88.52 in | 2,248 mm |
| Revolutions | 715.8 per mile | 444.8 per km |
| Rim diameter | 18 in | 457.2 mm |
Compare 235/55R18 with another size
Alternative sizes on the same 18-inch wheel
Sizes in use within ±3 % of the overall diameter of 235/55R18:
Plus and minus sizes for 235/55R18
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 235/65R16 | Minus 2 (16 in) | 28.03 in | −0.53% |
| 225/70R16 | Minus 2 (16 in) | 28.40 in | +0.80% |
| 215/70R16 | Minus 2 (16 in) | 27.85 in | −1.16% |
| 215/75R16 | Minus 2 (16 in) | 28.70 in | +1.84% |
| 235/60R17 | Minus 1 (17 in) | 28.10 in | −0.27% |
| 255/55R17 | Minus 1 (17 in) | 28.04 in | −0.48% |
| 215/65R17 | Minus 1 (17 in) | 28.00 in | −0.61% |
| 225/65R17 | Minus 1 (17 in) | 28.52 in | +1.20% |
| 235/50R19 | Plus 1 (19 in) | 28.25 in | +0.27% |
| 215/55R19 | Plus 1 (19 in) | 28.31 in | +0.48% |
| 255/45R19 | Plus 1 (19 in) | 28.04 in | −0.50% |
| 285/40R19 | Plus 1 (19 in) | 27.98 in | −0.71% |
| 255/40R20 | Plus 2 (20 in) | 28.03 in | −0.52% |
| 235/45R20 | Plus 2 (20 in) | 28.33 in | +0.53% |
| 265/40R20 | Plus 2 (20 in) | 28.35 in | +0.60% |
| 285/35R20 | Plus 2 (20 in) | 27.85 in | −1.15% |
| 265/35R21 | Plus 3 (21 in) | 28.30 in | +0.45% |
| 255/35R21 | Plus 3 (21 in) | 28.03 in | −0.53% |
| 275/35R21 | Plus 3 (21 in) | 28.58 in | +1.43% |
| 245/35R21 | Plus 3 (21 in) | 27.75 in | −1.51% |
Vehicles approved with 235/55R18 tires
Models whose Swiss type approval lists 235/55R18 as a standard or optional size (4,545 approvals in total). Always check your own vehicle's placard or papers.
- Volkswagen Tiguan
- Audi Q3
- Skoda Kodiaq
- Audi A8
- DS DS7
- SEAT Tarraco
- Audi A6
- Volvo XC40
- Toyota RAV4
- Mercedes-Benz GLB
- Kia Sportage
- Volvo V90
- Citroen C5
- Nissan Qashqai
- Hyundai Tucson
- Chevrolet Captiva
- Opel Antara
- SsangYong Korando
- Jeep Compass
- Mercedes-Benz GLA
- Lexus NX300H
- Lancia Thema
- Leapmotor C10
- Kg Mobility Torres
- Mercedes-Benz S-Class
- Mercedes-Benz EQA
- Renault Austral
- Hyundai Staria
- Mercedes-Benz EQB
- Cadillac XT4
- Toyota Sienna
- DS 7
- SsangYong Rodius
- Mercedes-Benz B-Class
- Zeekr X
- Peugeot 508
Source: Swiss Federal Roads Office (FEDRO/ASTRA), open government data. Original data (downloaded 2026-09-29). Data processed by us; errors in processing are ours, not the publisher's.
Nearby 18-inch sizes
- 215/45R18 (−9.1%)
- 215/50R18 (−6.1%)
- 215/55R18 (−3.1%)
- 215/60R18 (−0.1%)
- 225/45R18 (−7.8%)
- 225/50R18 (−4.7%)
- 225/55R18 (−1.5%)
- 225/60R18 (+1.6%)
- 235/45R18 (−6.6%)
- 235/50R18 (−3.3%)
- 235/60R18 (+3.3%)
- 235/65R18 (+6.6%)
- 245/45R18 (−5.3%)
- 245/50R18 (−1.9%)
- 245/60R18 (+5.0%)
- 245/65R18 (+8.4%)
- 255/45R18 (−4.1%)
- 255/50R18 (−0.5%)
- 255/55R18 (+3.1%)
- 255/60R18 (+6.6%)
- 255/65R18 (+10.2%)
Reading the 235/55R18 size
- 235 — section width in millimetres (9.25 in).
- 55 — aspect ratio: the sidewall is 55 % of the width, 129.3 mm.
- R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
- 18 — fits a 18-inch diameter wheel.
The load index and speed rating (for example 91V) follow the size on the sidewall. They must meet at least the values on your vehicle's tire placard.