265/45R18 tire size
A 265/45R18 tire is 27.39 inches (695.7 mm) tall, 10.43 in (265 mm) wide and fits a 18-inch wheel. In inch notation it is roughly a 27.4x10.4R18.
| Overall diameter | 27.39 in | 695.7 mm |
|---|---|---|
| Section width | 10.43 in | 265 mm |
| Sidewall height | 4.69 in | 119.3 mm |
| Circumference | 86.05 in | 2,186 mm |
| Revolutions | 736.3 per mile | 457.5 per km |
| Rim diameter | 18 in | 457.2 mm |
Compare 265/45R18 with another size
Alternative sizes on the same 18-inch wheel
Sizes in use within ±3 % of the overall diameter of 265/45R18:
Plus and minus sizes for 265/45R18
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 245/60R16 | Minus 2 (16 in) | 27.57 in | +0.68% |
| 235/60R16 | Minus 2 (16 in) | 27.10 in | −1.05% |
| 235/65R16 | Minus 2 (16 in) | 28.03 in | +2.33% |
| 245/55R16 | Minus 2 (16 in) | 26.61 in | −2.85% |
| 235/55R17 | Minus 1 (17 in) | 27.18 in | −0.78% |
| 245/55R17 | Minus 1 (17 in) | 27.61 in | +0.80% |
| 255/55R17 | Minus 1 (17 in) | 28.04 in | +2.39% |
| 235/60R17 | Minus 1 (17 in) | 28.10 in | +2.60% |
| 305/35R19 | Plus 1 (19 in) | 27.41 in | +0.06% |
| 265/40R19 | Plus 1 (19 in) | 27.35 in | −0.16% |
| 235/45R19 | Plus 1 (19 in) | 27.33 in | −0.23% |
| 295/35R19 | Plus 1 (19 in) | 27.13 in | −0.95% |
| 235/40R20 | Plus 2 (20 in) | 27.40 in | +0.04% |
| 315/30R20 | Plus 2 (20 in) | 27.44 in | +0.19% |
| 265/35R20 | Plus 2 (20 in) | 27.30 in | −0.32% |
| 305/30R20 | Plus 2 (20 in) | 27.20 in | −0.68% |
| 275/30R21 | Plus 3 (21 in) | 27.50 in | +0.39% |
| 265/30R21 | Plus 3 (21 in) | 27.26 in | −0.47% |
| 285/30R21 | Plus 3 (21 in) | 27.73 in | +1.25% |
| 245/35R21 | Plus 3 (21 in) | 27.75 in | +1.32% |
Vehicles approved with 265/45R18 tires
Models whose Swiss type approval lists 265/45R18 as a standard or optional size (43 approvals in total). Always check your own vehicle's placard or papers.
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
- 245/35R18 (−9.6%)
- 245/40R18 (−6.1%)
- 245/45R18 (−2.6%)
- 245/50R18 (+0.9%)
- 255/35R18 (−8.6%)
- 255/40R18 (−5.0%)
- 255/45R18 (−1.3%)
- 255/50R18 (+2.4%)
- 255/55R18 (+6.0%)
- 265/35R18 (−7.6%)
- 265/40R18 (−3.8%)
- 275/35R18 (−6.6%)
- 275/40R18 (−2.7%)
- 275/45R18 (+1.3%)
- 285/35R18 (−5.6%)
- 285/40R18 (−1.5%)
- 285/45R18 (+2.6%)
- 285/50R18 (+6.7%)
- 285/55R18 (+10.8%)
Reading the 265/45R18 size
- 265 — section width in millimetres (10.43 in).
- 45 — aspect ratio: the sidewall is 45 % of the width, 119.3 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.