225/45R16 tire size
A 225/45R16 tire is 23.97 inches (608.9 mm) tall, 8.86 in (225 mm) wide and fits a 16-inch wheel. In inch notation it is roughly a 24.0x8.9R16.
| Overall diameter | 23.97 in | 608.9 mm |
|---|---|---|
| Section width | 8.86 in | 225 mm |
| Sidewall height | 3.99 in | 101.3 mm |
| Circumference | 75.31 in | 1,913 mm |
| Revolutions | 841.3 per mile | 522.8 per km |
| Rim diameter | 16 in | 406.4 mm |
Compare 225/45R16 with another size
Alternative sizes on the same 16-inch wheel
Sizes in use within ±3 % of the overall diameter of 225/45R16:
Plus and minus sizes for 225/45R16
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 195/65R14 | Minus 2 (14 in) | 23.98 in | +0.03% |
| 205/55R15 | Minus 1 (15 in) | 23.88 in | −0.39% |
| 225/50R15 | Minus 1 (15 in) | 23.86 in | −0.48% |
| 195/60R15 | Minus 1 (15 in) | 24.21 in | +1.00% |
| 215/50R15 | Minus 1 (15 in) | 23.46 in | −2.12% |
| 195/45R17 | Plus 1 (17 in) | 23.91 in | −0.26% |
| 225/40R17 | Plus 1 (17 in) | 24.09 in | +0.48% |
| 215/40R17 | Plus 1 (17 in) | 23.77 in | −0.84% |
| 205/45R17 | Plus 1 (17 in) | 24.26 in | +1.22% |
| 215/35R18 | Plus 2 (18 in) | 23.93 in | −0.20% |
| 225/35R18 | Plus 2 (18 in) | 24.20 in | +0.95% |
| 205/40R18 | Plus 2 (18 in) | 24.46 in | +2.02% |
| 235/35R18 | Plus 2 (18 in) | 24.48 in | +2.10% |
Vehicles approved with 225/45R16 tires
Models whose Swiss type approval lists 225/45R16 as a standard or optional size (7 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 16-inch sizes
Reading the 225/45R16 size
- 225 — section width in millimetres (8.86 in).
- 45 — aspect ratio: the sidewall is 45 % of the width, 101.3 mm.
- R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
- 16 — fits a 16-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.