225/75R15 tire size
A 225/75R15 tire is 28.29 inches (718.5 mm) tall, 8.86 in (225 mm) wide and fits a 15-inch wheel. In inch notation it is roughly a 28.3x8.9R15 — a "28-inch" tire.
| Overall diameter | 28.29 in | 718.5 mm |
|---|---|---|
| Section width | 8.86 in | 225 mm |
| Sidewall height | 6.64 in | 168.8 mm |
| Circumference | 88.87 in | 2,257 mm |
| Revolutions | 713.0 per mile | 443.0 per km |
| Rim diameter | 15 in | 381.0 mm |
Compare 225/75R15 with another size
Alternative sizes on the same 15-inch wheel
Sizes in use within ±3 % of the overall diameter of 225/75R15:
Plus and minus sizes for 225/75R15
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 225/70R16 | Plus 1 (16 in) | 28.40 in | +0.40% |
| 235/65R16 | Plus 1 (16 in) | 28.03 in | −0.92% |
| 215/75R16 | Plus 1 (16 in) | 28.70 in | +1.45% |
| 215/70R16 | Plus 1 (16 in) | 27.85 in | −1.54% |
| 235/60R17 | Plus 2 (17 in) | 28.10 in | −0.65% |
| 225/65R17 | Plus 2 (17 in) | 28.52 in | +0.81% |
| 255/55R17 | Plus 2 (17 in) | 28.04 in | −0.86% |
| 215/65R17 | Plus 2 (17 in) | 28.00 in | −1.00% |
| 235/55R18 | Plus 3 (18 in) | 28.18 in | −0.39% |
| 215/60R18 | Plus 3 (18 in) | 28.16 in | −0.46% |
| 255/50R18 | Plus 3 (18 in) | 28.04 in | −0.88% |
| 225/60R18 | Plus 3 (18 in) | 28.63 in | +1.21% |
Vehicles approved with 225/75R15 tires
Models whose Swiss type approval lists 225/75R15 as a standard or optional size (39 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 15-inch sizes
Reading the 225/75R15 size
- 225 — section width in millimetres (8.86 in).
- 75 — aspect ratio: the sidewall is 75 % of the width, 168.8 mm.
- R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
- 15 — fits a 15-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.