195/55R20 tire size
A 195/55R20 tire is 28.44 inches (722.5 mm) tall, 7.68 in (195 mm) wide and fits a 20-inch wheel. In inch notation it is roughly a 28.4x7.7R20 — a "28-inch" tire.
| Overall diameter | 28.44 in | 722.5 mm |
|---|---|---|
| Section width | 7.68 in | 195 mm |
| Sidewall height | 4.22 in | 107.3 mm |
| Circumference | 89.36 in | 2,270 mm |
| Revolutions | 709.0 per mile | 440.6 per km |
| Rim diameter | 20 in | 508.0 mm |
Compare 195/55R20 with another size
Alternative sizes on the same 20-inch wheel
Sizes in use within ±3 % of the overall diameter of 195/55R20:
Plus and minus sizes for 195/55R20
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 225/60R18 | Minus 2 (18 in) | 28.63 in | +0.65% |
| 235/55R18 | Minus 2 (18 in) | 28.18 in | −0.94% |
| 215/60R18 | Minus 2 (18 in) | 28.16 in | −1.01% |
| 235/60R18 | Minus 2 (18 in) | 29.10 in | +2.31% |
| 215/55R19 | Minus 1 (19 in) | 28.31 in | −0.47% |
| 235/50R19 | Minus 1 (19 in) | 28.25 in | −0.68% |
| 245/50R19 | Minus 1 (19 in) | 28.65 in | +0.71% |
| 225/55R19 | Minus 1 (19 in) | 28.74 in | +1.05% |
| 245/40R21 | Plus 1 (21 in) | 28.72 in | +0.96% |
| 245/35R21 | Plus 1 (21 in) | 27.75 in | −2.44% |
Vehicles approved with 195/55R20 tires
Models whose Swiss type approval lists 195/55R20 as a standard or optional size (174 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 195/55R20 size
- 195 — section width in millimetres (7.68 in).
- 55 — aspect ratio: the sidewall is 55 % of the width, 107.3 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.