335/30R18 tire size
A 335/30R18 tire is 25.91 inches (658.2 mm) tall, 13.19 in (335 mm) wide and fits a 18-inch wheel. In inch notation it is roughly a 25.9x13.2R18.
| Overall diameter | 25.91 in | 658.2 mm |
|---|---|---|
| Section width | 13.19 in | 335 mm |
| Sidewall height | 3.96 in | 100.5 mm |
| Circumference | 81.41 in | 2,068 mm |
| Revolutions | 778.3 per mile | 483.6 per km |
| Rim diameter | 18 in | 457.2 mm |
Compare 335/30R18 with another size
Plus and minus sizes for 335/30R18
Vehicles approved with 335/30R18 tires
Models whose Swiss type approval lists 335/30R18 as a standard or optional size (30 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.
Reading the 335/30R18 size
- 335 — section width in millimetres (13.19 in).
- 30 — aspect ratio: the sidewall is 30 % of the width, 100.5 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.