185/55R13 tire size
A 185/55R13 tire is 21.01 inches (533.7 mm) tall, 7.28 in (185 mm) wide and fits a 13-inch wheel. In inch notation it is roughly a 21.0x7.3R13.
| Overall diameter | 21.01 in | 533.7 mm |
|---|---|---|
| Section width | 7.28 in | 185 mm |
| Sidewall height | 4.01 in | 101.8 mm |
| Circumference | 66.01 in | 1,677 mm |
| Revolutions | 959.8 per mile | 596.4 per km |
| Rim diameter | 13 in | 330.2 mm |
Compare 185/55R13 with another size
Alternative sizes on the same 13-inch wheel
Sizes in use within ±3 % of the overall diameter of 185/55R13:
Plus and minus sizes for 185/55R13
Vehicles approved with 185/55R13 tires
Models whose Swiss type approval lists 185/55R13 as a standard or optional size (20 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 13-inch sizes
Reading the 185/55R13 size
- 185 — section width in millimetres (7.28 in).
- 55 — aspect ratio: the sidewall is 55 % of the width, 101.8 mm.
- R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
- 13 — fits a 13-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.