255/40R22 tire size
A 255/40R22 tire is 30.03 inches (762.8 mm) tall, 10.04 in (255 mm) wide and fits a 22-inch wheel. In inch notation it is roughly a 30.0x10.0R22 — a "30-inch" tire.
| Overall diameter | 30.03 in | 762.8 mm |
|---|---|---|
| Section width | 10.04 in | 255 mm |
| Sidewall height | 4.02 in | 102.0 mm |
| Circumference | 94.35 in | 2,396 mm |
| Revolutions | 671.6 per mile | 417.3 per km |
| Rim diameter | 22 in | 558.8 mm |
Compare 255/40R22 with another size
Alternative sizes on the same 22-inch wheel
Sizes in use within ±3 % of the overall diameter of 255/40R22:
Plus and minus sizes for 255/40R22
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 255/50R20 | Minus 2 (20 in) | 30.04 in | +0.03% |
| 285/45R20 | Minus 2 (20 in) | 30.10 in | +0.22% |
| 235/55R20 | Minus 2 (20 in) | 30.18 in | +0.49% |
| 275/45R20 | Minus 2 (20 in) | 29.74 in | −0.96% |
| 255/45R21 | Minus 1 (21 in) | 30.04 in | +0.01% |
| 285/40R21 | Minus 1 (21 in) | 29.98 in | −0.18% |
| 235/50R21 | Minus 1 (21 in) | 30.25 in | +0.73% |
| 295/40R21 | Minus 1 (21 in) | 30.29 in | +0.87% |
| 275/35R23 | Plus 1 (23 in) | 30.58 in | +1.82% |
| 285/35R23 | Plus 1 (23 in) | 30.85 in | +2.74% |
Vehicles approved with 255/40R22 tires
Models whose Swiss type approval lists 255/40R22 as a standard or optional size (12 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 22-inch sizes
Reading the 255/40R22 size
- 255 — section width in millimetres (10.04 in).
- 40 — aspect ratio: the sidewall is 40 % of the width, 102.0 mm.
- R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
- 22 — fits a 22-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.