295/40R21 tire size
A 295/40R21 tire is 30.29 inches (769.4 mm) tall, 11.61 in (295 mm) wide and fits a 21-inch wheel. In inch notation it is roughly a 30.3x11.6R21 — a "30-inch" tire.
| Overall diameter | 30.29 in | 769.4 mm |
|---|---|---|
| Section width | 11.61 in | 295 mm |
| Sidewall height | 4.65 in | 118.0 mm |
| Circumference | 95.16 in | 2,417 mm |
| Revolutions | 665.8 per mile | 413.7 per km |
| Rim diameter | 21 in | 533.4 mm |
Compare 295/40R21 with another size
Alternative sizes on the same 21-inch wheel
Sizes in use within ±3 % of the overall diameter of 295/40R21:
Plus and minus sizes for 295/40R21
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 265/55R19 | Minus 2 (19 in) | 30.48 in | +0.61% |
| 275/50R19 | Minus 2 (19 in) | 29.83 in | −1.53% |
| 275/55R19 | Minus 2 (19 in) | 30.91 in | +2.04% |
| 295/45R19 | Minus 2 (19 in) | 29.45 in | −2.77% |
| 265/50R20 | Minus 1 (20 in) | 30.43 in | +0.47% |
| 295/45R20 | Minus 1 (20 in) | 30.45 in | +0.53% |
| 285/45R20 | Minus 1 (20 in) | 30.10 in | −0.64% |
| 275/50R20 | Minus 1 (20 in) | 30.83 in | +1.77% |
| 265/40R22 | Plus 1 (22 in) | 30.35 in | +0.18% |
| 295/35R22 | Plus 1 (22 in) | 30.13 in | −0.53% |
| 275/40R22 | Plus 1 (22 in) | 30.66 in | +1.22% |
| 315/35R22 | Plus 1 (22 in) | 30.68 in | +1.29% |
| 315/30R23 | Plus 2 (23 in) | 30.44 in | +0.49% |
| 275/35R23 | Plus 2 (23 in) | 30.58 in | +0.95% |
| 325/30R23 | Plus 2 (23 in) | 30.68 in | +1.27% |
| 285/35R23 | Plus 2 (23 in) | 30.85 in | +1.86% |
Vehicles approved with 295/40R21 tires
Models whose Swiss type approval lists 295/40R21 as a standard or optional size (77 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 295/40R21 size
- 295 — section width in millimetres (11.61 in).
- 40 — aspect ratio: the sidewall is 40 % of the width, 118.0 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.