255/30R19 tire size
A 255/30R19 tire is 25.02 inches (635.6 mm) tall, 10.04 in (255 mm) wide and fits a 19-inch wheel. In inch notation it is roughly a 25.0x10.0R19.
| Overall diameter | 25.02 in | 635.6 mm |
|---|---|---|
| Section width | 10.04 in | 255 mm |
| Sidewall height | 3.01 in | 76.5 mm |
| Circumference | 78.61 in | 1,997 mm |
| Revolutions | 806.0 per mile | 500.8 per km |
| Rim diameter | 19 in | 482.6 mm |
Compare 255/30R19 with another size
Alternative sizes on the same 19-inch wheel
Sizes in use within ±3 % of the overall diameter of 255/30R19:
Plus and minus sizes for 255/30R19
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 255/40R17 | Minus 2 (17 in) | 25.03 in | +0.03% |
| 225/45R17 | Minus 2 (17 in) | 24.97 in | −0.20% |
| 235/45R17 | Minus 2 (17 in) | 25.33 in | +1.21% |
| 245/40R17 | Minus 2 (17 in) | 24.72 in | −1.23% |
| 255/35R18 | Minus 1 (18 in) | 25.03 in | +0.02% |
| 295/30R18 | Minus 1 (18 in) | 24.97 in | −0.22% |
| 225/40R18 | Minus 1 (18 in) | 25.09 in | +0.25% |
| 245/35R18 | Minus 1 (18 in) | 24.75 in | −1.09% |
Vehicles approved with 255/30R19 tires
Models whose Swiss type approval lists 255/30R19 as a standard or optional size (382 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 19-inch sizes
Reading the 255/30R19 size
- 255 — section width in millimetres (10.04 in).
- 30 — aspect ratio: the sidewall is 30 % of the width, 76.5 mm.
- R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
- 19 — fits a 19-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.