265/30R21 tire size
A 265/30R21 tire is 27.26 inches (692.4 mm) tall, 10.43 in (265 mm) wide and fits a 21-inch wheel. In inch notation it is roughly a 27.3x10.4R21.
| Overall diameter | 27.26 in | 692.4 mm |
|---|---|---|
| Section width | 10.43 in | 265 mm |
| Sidewall height | 3.13 in | 79.5 mm |
| Circumference | 85.64 in | 2,175 mm |
| Revolutions | 739.8 per mile | 459.7 per km |
| Rim diameter | 21 in | 533.4 mm |
Compare 265/30R21 with another size
Alternative sizes on the same 21-inch wheel
Sizes in use within ±3 % of the overall diameter of 265/30R21:
Plus and minus sizes for 265/30R21
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 235/45R19 | Minus 2 (19 in) | 27.33 in | +0.25% |
| 265/40R19 | Minus 2 (19 in) | 27.35 in | +0.32% |
| 295/35R19 | Minus 2 (19 in) | 27.13 in | −0.48% |
| 305/35R19 | Minus 2 (19 in) | 27.41 in | +0.53% |
| 265/35R20 | Minus 1 (20 in) | 27.30 in | +0.16% |
| 305/30R20 | Minus 1 (20 in) | 27.20 in | −0.20% |
| 235/40R20 | Minus 1 (20 in) | 27.40 in | +0.52% |
| 315/30R20 | Minus 1 (20 in) | 27.44 in | +0.66% |
Vehicles approved with 265/30R21 tires
Models whose Swiss type approval lists 265/30R21 as a standard or optional size (58 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 265/30R21 size
- 265 — section width in millimetres (10.43 in).
- 30 — aspect ratio: the sidewall is 30 % of the width, 79.5 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.