285/60R18 tire size
A 285/60R18 tire is 31.46 inches (799.2 mm) tall, 11.22 in (285 mm) wide and fits a 18-inch wheel. In inch notation it is roughly a 31.5x11.2R18 — a "31-inch" tire.
| Overall diameter | 31.46 in | 799.2 mm |
|---|---|---|
| Section width | 11.22 in | 285 mm |
| Sidewall height | 6.73 in | 171.0 mm |
| Circumference | 98.85 in | 2,511 mm |
| Revolutions | 641.0 per mile | 398.3 per km |
| Rim diameter | 18 in | 457.2 mm |
Compare 285/60R18 with another size
Alternative sizes on the same 18-inch wheel
Sizes in use within ±3 % of the overall diameter of 285/60R18:
Plus and minus sizes for 285/60R18
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 265/75R16 | Minus 2 (16 in) | 31.65 in | +0.59% |
| 275/70R16 | Minus 2 (16 in) | 31.16 in | −0.98% |
| 265/70R16 | Minus 2 (16 in) | 30.61 in | −2.73% |
| 285/65R17 | Minus 1 (17 in) | 31.59 in | +0.39% |
| 265/70R17 | Minus 1 (17 in) | 31.61 in | +0.45% |
| 275/65R17 | Minus 1 (17 in) | 31.07 in | −1.24% |
| 255/70R17 | Minus 1 (17 in) | 31.06 in | −1.30% |
| 255/60R19 | Plus 1 (19 in) | 31.05 in | −1.33% |
| 275/55R19 | Plus 1 (19 in) | 30.91 in | −1.76% |
| 255/65R19 | Plus 1 (19 in) | 32.05 in | +1.86% |
| 285/50R20 | Plus 2 (20 in) | 31.22 in | −0.78% |
| 255/55R20 | Plus 2 (20 in) | 31.04 in | −1.34% |
| 275/55R20 | Plus 2 (20 in) | 31.91 in | +1.41% |
| 255/60R20 | Plus 2 (20 in) | 32.05 in | +1.85% |
| 325/40R21 | Plus 3 (21 in) | 31.24 in | −0.73% |
| 275/50R21 | Plus 3 (21 in) | 31.83 in | +1.15% |
| 285/45R21 | Plus 3 (21 in) | 31.10 in | −1.16% |
| 255/50R21 | Plus 3 (21 in) | 31.04 in | −1.35% |
Vehicles approved with 285/60R18 tires
Models whose Swiss type approval lists 285/60R18 as a standard or optional size (15 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
Reading the 285/60R18 size
- 285 — section width in millimetres (11.22 in).
- 60 — aspect ratio: the sidewall is 60 % of the width, 171.0 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.