245/70R17 tire size
A 245/70R17 tire is 30.50 inches (774.8 mm) tall, 9.65 in (245 mm) wide and fits a 17-inch wheel. In inch notation it is roughly a 30.5x9.6R17 — a "31-inch" tire.
| Overall diameter | 30.50 in | 774.8 mm |
|---|---|---|
| Section width | 9.65 in | 245 mm |
| Sidewall height | 6.75 in | 171.5 mm |
| Circumference | 95.83 in | 2,434 mm |
| Revolutions | 661.2 per mile | 410.8 per km |
| Rim diameter | 17 in | 431.8 mm |
Compare 245/70R17 with another size
Alternative sizes on the same 17-inch wheel
Sizes in use within ±3 % of the overall diameter of 245/70R17:
Plus and minus sizes for 245/70R17
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 255/75R15 | Minus 2 (15 in) | 30.06 in | −1.46% |
| 265/70R15 | Minus 2 (15 in) | 29.61 in | −2.94% |
| 245/75R16 | Minus 1 (16 in) | 30.47 in | −0.12% |
| 265/70R16 | Minus 1 (16 in) | 30.61 in | +0.34% |
| 235/80R16 | Minus 1 (16 in) | 30.80 in | +0.98% |
| 255/70R16 | Minus 1 (16 in) | 30.06 in | −1.47% |
| 265/60R18 | Plus 1 (18 in) | 30.52 in | +0.05% |
| 245/65R18 | Plus 1 (18 in) | 30.54 in | +0.12% |
| 285/55R18 | Plus 1 (18 in) | 30.34 in | −0.53% |
| 255/60R18 | Plus 1 (18 in) | 30.05 in | −1.50% |
| 265/55R19 | Plus 2 (19 in) | 30.48 in | −0.09% |
| 235/60R19 | Plus 2 (19 in) | 30.10 in | −1.32% |
| 275/55R19 | Plus 2 (19 in) | 30.91 in | +1.33% |
| 255/55R19 | Plus 2 (19 in) | 30.04 in | −1.51% |
| 295/45R20 | Plus 3 (20 in) | 30.45 in | −0.17% |
| 265/50R20 | Plus 3 (20 in) | 30.43 in | −0.23% |
| 275/50R20 | Plus 3 (20 in) | 30.83 in | +1.06% |
| 235/55R20 | Plus 3 (20 in) | 30.18 in | −1.07% |
Vehicles approved with 245/70R17 tires
Models whose Swiss type approval lists 245/70R17 as a standard or optional size (84 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 17-inch sizes
Reading the 245/70R17 size
- 245 — section width in millimetres (9.65 in).
- 70 — aspect ratio: the sidewall is 70 % of the width, 171.5 mm.
- R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
- 17 — fits a 17-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.