325/40R22 tire size
A 325/40R22 tire is 32.24 inches (818.8 mm) tall, 12.80 in (325 mm) wide and fits a 22-inch wheel. In inch notation it is roughly a 32.2x12.8R22 — a "32-inch" tire.
| Overall diameter | 32.24 in | 818.8 mm |
|---|---|---|
| Section width | 12.80 in | 325 mm |
| Sidewall height | 5.12 in | 130.0 mm |
| Circumference | 101.27 in | 2,572 mm |
| Revolutions | 625.6 per mile | 388.8 per km |
| Rim diameter | 22 in | 558.8 mm |
Compare 325/40R22 with another size
Alternative sizes on the same 22-inch wheel
Sizes in use within ±3 % of the overall diameter of 325/40R22:
Plus and minus sizes for 325/40R22
Vehicles approved with 325/40R22 tires
Models whose Swiss type approval lists 325/40R22 as a standard or optional size (17 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 325/40R22 size
- 325 — section width in millimetres (12.80 in).
- 40 — aspect ratio: the sidewall is 40 % of the width, 130.0 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.