215/35R18 tire size
A 215/35R18 tire is 23.93 inches (607.7 mm) tall, 8.46 in (215 mm) wide and fits a 18-inch wheel. In inch notation it is roughly a 23.9x8.5R18.
| Overall diameter | 23.93 in | 607.7 mm |
|---|---|---|
| Section width | 8.46 in | 215 mm |
| Sidewall height | 2.96 in | 75.3 mm |
| Circumference | 75.16 in | 1,909 mm |
| Revolutions | 843.0 per mile | 523.8 per km |
| Rim diameter | 18 in | 457.2 mm |
Compare 215/35R18 with another size
Alternative sizes on the same 18-inch wheel
Sizes in use within ±3 % of the overall diameter of 215/35R18:
Plus and minus sizes for 215/35R18
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 225/45R16 | Minus 2 (16 in) | 23.97 in | +0.20% |
| 185/55R16 | Minus 2 (16 in) | 24.01 in | +0.36% |
| 205/50R16 | Minus 2 (16 in) | 24.07 in | +0.61% |
| 195/50R16 | Minus 2 (16 in) | 23.68 in | −1.04% |
| 195/45R17 | Minus 1 (17 in) | 23.91 in | −0.07% |
| 215/40R17 | Minus 1 (17 in) | 23.77 in | −0.64% |
| 225/40R17 | Minus 1 (17 in) | 24.09 in | +0.67% |
| 205/45R17 | Minus 1 (17 in) | 24.26 in | +1.42% |
Vehicles approved with 215/35R18 tires
Models whose Swiss type approval lists 215/35R18 as a standard or optional size (73 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 18-inch sizes
Reading the 215/35R18 size
- 215 — section width in millimetres (8.46 in).
- 35 — aspect ratio: the sidewall is 35 % of the width, 75.3 mm.
- R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
- 18 — fits a 18-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.