335/30R21 tire size
A 335/30R21 tire is 28.91 inches (734.4 mm) tall, 13.19 in (335 mm) wide and fits a 21-inch wheel. In inch notation it is roughly a 28.9x13.2R21 — a "29-inch" tire.
| Overall diameter | 28.91 in | 734.4 mm |
|---|---|---|
| Section width | 13.19 in | 335 mm |
| Sidewall height | 3.96 in | 100.5 mm |
| Circumference | 90.83 in | 2,307 mm |
| Revolutions | 697.5 per mile | 433.4 per km |
| Rim diameter | 21 in | 533.4 mm |
Compare 335/30R21 with another size
Alternative sizes on the same 21-inch wheel
Sizes in use within ±3 % of the overall diameter of 335/30R21:
Plus and minus sizes for 335/30R21
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 345/35R19 | Minus 2 (19 in) | 28.51 in | −1.40% |
| 325/35R20 | Minus 1 (20 in) | 28.96 in | +0.15% |
| 315/35R20 | Minus 1 (20 in) | 28.68 in | −0.80% |
| 305/35R20 | Minus 1 (20 in) | 28.41 in | −1.76% |
| 305/40R20 | Minus 1 (20 in) | 29.61 in | +2.40% |
| 355/25R22 | Plus 1 (22 in) | 28.99 in | +0.26% |
| 305/30R22 | Plus 1 (22 in) | 29.20 in | +1.01% |
| 315/30R22 | Plus 1 (22 in) | 29.44 in | +1.82% |
Vehicles approved with 335/30R21 tires
Models whose Swiss type approval lists 335/30R21 as a standard or optional size (17 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 21-inch sizes
Reading the 335/30R21 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).
- 21 — fits a 21-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.