175/50R15 tire size
A 175/50R15 tire is 21.89 inches (556.0 mm) tall, 6.89 in (175 mm) wide and fits a 15-inch wheel. In inch notation it is roughly a 21.9x6.9R15.
| Overall diameter | 21.89 in | 556.0 mm |
|---|---|---|
| Section width | 6.89 in | 175 mm |
| Sidewall height | 3.44 in | 87.5 mm |
| Circumference | 68.77 in | 1,747 mm |
| Revolutions | 921.3 per mile | 572.5 per km |
| Rim diameter | 15 in | 381.0 mm |
Compare 175/50R15 with another size
Alternative sizes on the same 15-inch wheel
Sizes in use within ±3 % of the overall diameter of 175/50R15:
Plus and minus sizes for 175/50R15
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 205/55R13 | Minus 2 (13 in) | 21.88 in | −0.05% |
| 175/65R13 | Minus 2 (13 in) | 21.96 in | +0.31% |
| 185/60R13 | Minus 2 (13 in) | 21.74 in | −0.68% |
| 165/70R13 | Minus 2 (13 in) | 22.09 in | +0.94% |
| 155/65R14 | Minus 1 (14 in) | 21.93 in | +0.20% |
| 165/60R14 | Minus 1 (14 in) | 21.80 in | −0.43% |
| 185/55R14 | Minus 1 (14 in) | 22.01 in | +0.56% |
| 175/60R14 | Minus 1 (14 in) | 22.27 in | +1.73% |
Vehicles approved with 175/50R15 tires
Models whose Swiss type approval lists 175/50R15 as a standard or optional size (21 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 175/50R15 size
- 175 — section width in millimetres (6.89 in).
- 50 — aspect ratio: the sidewall is 50 % of the width, 87.5 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.