235/50R18 tire size
A 235/50R18 tire is 27.25 inches (692.2 mm) tall, 9.25 in (235 mm) wide and fits a 18-inch wheel. In inch notation it is roughly a 27.3x9.3R18.
| Overall diameter | 27.25 in | 692.2 mm |
|---|---|---|
| Section width | 9.25 in | 235 mm |
| Sidewall height | 4.63 in | 117.5 mm |
| Circumference | 85.61 in | 2,175 mm |
| Revolutions | 740.1 per mile | 459.9 per km |
| Rim diameter | 18 in | 457.2 mm |
Compare 235/50R18 with another size
Alternative sizes on the same 18-inch wheel
Sizes in use within ±3 % of the overall diameter of 235/50R18:
Plus and minus sizes for 235/50R18
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 205/70R16 | Minus 2 (16 in) | 27.30 in | +0.17% |
| 235/60R16 | Minus 2 (16 in) | 27.10 in | −0.55% |
| 215/65R16 | Minus 2 (16 in) | 27.00 in | −0.91% |
| 225/65R16 | Minus 2 (16 in) | 27.52 in | +0.97% |
| 235/55R17 | Minus 1 (17 in) | 27.18 in | −0.27% |
| 215/60R17 | Minus 1 (17 in) | 27.16 in | −0.35% |
| 205/65R17 | Minus 1 (17 in) | 27.49 in | +0.88% |
| 245/55R17 | Minus 1 (17 in) | 27.61 in | +1.31% |
| 235/45R19 | Plus 1 (19 in) | 27.33 in | +0.27% |
| 265/40R19 | Plus 1 (19 in) | 27.35 in | +0.35% |
| 205/50R19 | Plus 1 (19 in) | 27.07 in | −0.66% |
| 215/50R19 | Plus 1 (19 in) | 27.46 in | +0.78% |
| 265/35R20 | Plus 2 (20 in) | 27.30 in | +0.19% |
| 235/40R20 | Plus 2 (20 in) | 27.40 in | +0.55% |
| 225/40R20 | Plus 2 (20 in) | 27.09 in | −0.61% |
| 255/35R20 | Plus 2 (20 in) | 27.03 in | −0.82% |
| 265/30R21 | Plus 3 (21 in) | 27.26 in | +0.03% |
| 275/30R21 | Plus 3 (21 in) | 27.50 in | +0.90% |
| 285/30R21 | Plus 3 (21 in) | 27.73 in | +1.76% |
| 245/35R21 | Plus 3 (21 in) | 27.75 in | +1.83% |
Vehicles approved with 235/50R18 tires
Models whose Swiss type approval lists 235/50R18 as a standard or optional size (1,539 approvals in total). Always check your own vehicle's placard or papers.
- Volkswagen Tiguan
- Audi Q3
- Ford Kuga
- Mercedes-Benz GLA
- Maserati Ghibli
- Ford Galaxy
- Ford S-MAX
- Volvo XC70
- BMW X3
- Alfa Romeo Tonale
- Infiniti Q30
- BMW 7 Series
- Volkswagen Phaeton
- Jeep Renegade
- Opel Insignia
- Cadillac CTS
- Opel Astra
- Opel Cascada
- Volkswagen Multivan
- Smart 1
- DS DS9
- Land Rover Freelander
- Volvo V60
- Audi RS
- Infiniti QX30
- Jaguar XJ8
- BYD Atto
- Cadillac STS
- Lexus LS460
- Jaguar XJ
- Leapmotor B10
- Jeep Compass
- Volvo S60
- Mercedes-Benz S-Class
- Bentley Arnage
- Ford Tourneo Custom
- Ford Transit Custom
- Lexus LS600h
- Maserati Levante
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
- 215/40R18 (−9.1%)
- 215/45R18 (−6.0%)
- 215/50R18 (−2.9%)
- 215/55R18 (+0.2%)
- 215/60R18 (+3.3%)
- 225/40R18 (−7.9%)
- 225/45R18 (−4.7%)
- 225/50R18 (−1.4%)
- 225/55R18 (+1.8%)
- 225/60R18 (+5.1%)
- 235/40R18 (−6.8%)
- 235/45R18 (−3.4%)
- 235/55R18 (+3.4%)
- 235/60R18 (+6.8%)
- 245/40R18 (−5.6%)
- 245/45R18 (−2.1%)
- 245/50R18 (+1.4%)
- 245/60R18 (+8.5%)
- 255/40R18 (−4.5%)
- 255/45R18 (−0.8%)
- 255/50R18 (+2.9%)
- 255/55R18 (+6.6%)
- 255/60R18 (+10.3%)
Reading the 235/50R18 size
- 235 — section width in millimetres (9.25 in).
- 50 — aspect ratio: the sidewall is 50 % of the width, 117.5 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.