305/30R22 tire size
A 305/30R22 tire is 29.20 inches (741.8 mm) tall, 12.01 in (305 mm) wide and fits a 22-inch wheel. In inch notation it is roughly a 29.2x12.0R22 — a "29-inch" tire.
| Overall diameter | 29.20 in | 741.8 mm |
|---|---|---|
| Section width | 12.01 in | 305 mm |
| Sidewall height | 3.60 in | 91.5 mm |
| Circumference | 91.75 in | 2,330 mm |
| Revolutions | 690.6 per mile | 429.1 per km |
| Rim diameter | 22 in | 558.8 mm |
Compare 305/30R22 with another size
Alternative sizes on the same 22-inch wheel
Sizes in use within ±3 % of the overall diameter of 305/30R22:
Plus and minus sizes for 305/30R22
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 295/40R20 | Minus 2 (20 in) | 29.29 in | +0.30% |
| 285/40R20 | Minus 2 (20 in) | 28.98 in | −0.78% |
| 325/35R20 | Minus 2 (20 in) | 28.96 in | −0.85% |
| 305/40R20 | Minus 2 (20 in) | 29.61 in | +1.38% |
| 345/30R21 | Minus 1 (21 in) | 29.15 in | −0.19% |
| 295/35R21 | Minus 1 (21 in) | 29.13 in | −0.26% |
| 305/35R21 | Minus 1 (21 in) | 29.41 in | +0.69% |
| 335/30R21 | Minus 1 (21 in) | 28.91 in | −1.00% |
Vehicles approved with 305/30R22 tires
Models whose Swiss type approval lists 305/30R22 as a standard or optional size (6 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 305/30R22 size
- 305 — section width in millimetres (12.01 in).
- 30 — aspect ratio: the sidewall is 30 % of the width, 91.5 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.