215/45R18 tire size
A 215/45R18 tire is 25.62 inches (650.7 mm) tall, 8.46 in (215 mm) wide and fits a 18-inch wheel. In inch notation it is roughly a 25.6x8.5R18.
| Overall diameter | 25.62 in | 650.7 mm |
|---|---|---|
| Section width | 8.46 in | 215 mm |
| Sidewall height | 3.81 in | 96.8 mm |
| Circumference | 80.48 in | 2,044 mm |
| Revolutions | 787.3 per mile | 489.2 per km |
| Rim diameter | 18 in | 457.2 mm |
Compare 215/45R18 with another size
Alternative sizes on the same 18-inch wheel
Sizes in use within ±3 % of the overall diameter of 215/45R18:
Plus and minus sizes for 215/45R18
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 245/50R16 | Minus 2 (16 in) | 25.65 in | +0.11% |
| 205/60R16 | Minus 2 (16 in) | 25.69 in | +0.26% |
| 225/55R16 | Minus 2 (16 in) | 25.74 in | +0.49% |
| 215/55R16 | Minus 2 (16 in) | 25.31 in | −1.20% |
| 245/45R17 | Minus 1 (17 in) | 25.68 in | +0.25% |
| 215/50R17 | Minus 1 (17 in) | 25.46 in | −0.60% |
| 195/55R17 | Minus 1 (17 in) | 25.44 in | −0.68% |
| 225/50R17 | Minus 1 (17 in) | 25.86 in | +0.94% |
| 245/35R19 | Plus 1 (19 in) | 25.75 in | +0.52% |
| 235/35R19 | Plus 1 (19 in) | 25.48 in | −0.55% |
| 265/30R19 | Plus 1 (19 in) | 25.26 in | −1.40% |
| 255/35R19 | Plus 1 (19 in) | 26.03 in | +1.60% |
| 245/30R20 | Plus 2 (20 in) | 25.79 in | +0.66% |
| 255/30R20 | Plus 2 (20 in) | 26.02 in | +1.58% |
| 225/35R20 | Plus 2 (20 in) | 26.20 in | +2.27% |
| 265/30R20 | Plus 2 (20 in) | 26.26 in | +2.50% |
Vehicles approved with 215/45R18 tires
Models whose Swiss type approval lists 215/45R18 as a standard or optional size (1,082 approvals in total). Always check your own vehicle's placard or papers.
- SEAT Arona
- Volkswagen T-Cross
- Mazda 3
- Citroen C4 Picasso
- Skoda Kamiq
- Peugeot 5008
- Volvo V50
- Audi A1
- Volvo S40
- Mercedes-Benz CLA
- Volkswagen Taigo
- Volvo C30
- Mitsubishi Lancer
- Mercedes-Benz A-Class
- SsangYong Tivoli
- SsangYong XLV
- Ford EcoSport
- Peugeot E-308
- Opel Astra
- Nissan Pulsar
- Mazda 6
- Chevrolet Epica
- Subaru Legacy
- Dodge Caliber
- Mercedes-Benz B-Class
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
- 195/55R18 (+3.2%)
- 205/40R18 (−4.5%)
- 205/45R18 (−1.4%)
- 205/55R18 (+4.9%)
- 215/35R18 (−6.6%)
- 215/40R18 (−3.3%)
- 215/50R18 (+3.3%)
- 215/55R18 (+6.6%)
- 225/35R18 (−5.5%)
- 225/40R18 (−2.1%)
- 225/45R18 (+1.4%)
- 225/50R18 (+4.8%)
- 225/55R18 (+8.3%)
- 235/35R18 (−4.5%)
- 235/40R18 (−0.8%)
- 235/45R18 (+2.8%)
- 235/50R18 (+6.4%)
- 235/55R18 (+10.0%)
Reading the 215/45R18 size
- 215 — section width in millimetres (8.46 in).
- 45 — aspect ratio: the sidewall is 45 % of the width, 96.8 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.