245/30R20 tire size
A 245/30R20 tire is 25.79 inches (655.0 mm) tall, 9.65 in (245 mm) wide and fits a 20-inch wheel. In inch notation it is roughly a 25.8x9.6R20.
| Overall diameter | 25.79 in | 655.0 mm |
|---|---|---|
| Section width | 9.65 in | 245 mm |
| Sidewall height | 2.89 in | 73.5 mm |
| Circumference | 81.01 in | 2,058 mm |
| Revolutions | 782.1 per mile | 486.0 per km |
| Rim diameter | 20 in | 508.0 mm |
Compare 245/30R20 with another size
Alternative sizes on the same 20-inch wheel
Sizes in use within ±3 % of the overall diameter of 245/30R20:
Plus and minus sizes for 245/30R20
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 285/35R18 | Minus 2 (18 in) | 25.85 in | +0.26% |
| 245/40R18 | Minus 2 (18 in) | 25.72 in | −0.27% |
| 215/45R18 | Minus 2 (18 in) | 25.62 in | −0.66% |
| 225/45R18 | Minus 2 (18 in) | 25.97 in | +0.72% |
| 245/35R19 | Minus 1 (19 in) | 25.75 in | −0.14% |
| 285/30R19 | Minus 1 (19 in) | 25.73 in | −0.21% |
| 295/30R19 | Minus 1 (19 in) | 25.97 in | +0.70% |
| 255/35R19 | Minus 1 (19 in) | 26.03 in | +0.93% |
Vehicles approved with 245/30R20 tires
Models whose Swiss type approval lists 245/30R20 as a standard or optional size (172 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 20-inch sizes
Reading the 245/30R20 size
- 245 — section width in millimetres (9.65 in).
- 30 — aspect ratio: the sidewall is 30 % of the width, 73.5 mm.
- R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
- 20 — fits a 20-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.