245/50R20 tire size
A 245/50R20 tire is 29.65 inches (753.0 mm) tall, 9.65 in (245 mm) wide and fits a 20-inch wheel. In inch notation it is roughly a 29.6x9.6R20 — a "30-inch" tire.
| Overall diameter | 29.65 in | 753.0 mm |
|---|---|---|
| Section width | 9.65 in | 245 mm |
| Sidewall height | 4.82 in | 122.5 mm |
| Circumference | 93.13 in | 2,366 mm |
| Revolutions | 680.3 per mile | 422.7 per km |
| Rim diameter | 20 in | 508.0 mm |
Compare 245/50R20 with another size
Alternative sizes on the same 20-inch wheel
Sizes in use within ±3 % of the overall diameter of 245/50R20:
Plus and minus sizes for 245/50R20
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 245/60R18 | Minus 2 (18 in) | 29.57 in | −0.24% |
| 235/65R18 | Minus 2 (18 in) | 30.03 in | +1.29% |
| 255/60R18 | Minus 2 (18 in) | 30.05 in | +1.35% |
| 285/50R18 | Minus 2 (18 in) | 29.22 in | −1.43% |
| 275/50R19 | Minus 1 (19 in) | 29.83 in | +0.61% |
| 295/45R19 | Minus 1 (19 in) | 29.45 in | −0.65% |
| 265/50R19 | Minus 1 (19 in) | 29.43 in | −0.72% |
| 255/55R19 | Minus 1 (19 in) | 30.04 in | +1.34% |
| 275/40R21 | Plus 1 (21 in) | 29.66 in | +0.05% |
| 245/45R21 | Plus 1 (21 in) | 29.68 in | +0.12% |
| 265/40R21 | Plus 1 (21 in) | 29.35 in | −1.01% |
| 235/45R21 | Plus 1 (21 in) | 29.33 in | −1.08% |
| 275/35R22 | Plus 2 (22 in) | 29.58 in | −0.23% |
| 285/35R22 | Plus 2 (22 in) | 29.85 in | +0.70% |
| 265/35R22 | Plus 2 (22 in) | 29.30 in | −1.16% |
| 255/40R22 | Plus 2 (22 in) | 30.03 in | +1.30% |
Vehicles approved with 245/50R20 tires
Models whose Swiss type approval lists 245/50R20 as a standard or optional size (40 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 245/50R20 size
- 245 — section width in millimetres (9.65 in).
- 50 — aspect ratio: the sidewall is 50 % of the width, 122.5 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.