265/40R20 tire size
A 265/40R20 tire is 28.35 inches (720.0 mm) tall, 10.43 in (265 mm) wide and fits a 20-inch wheel. In inch notation it is roughly a 28.3x10.4R20 — a "28-inch" tire.
| Overall diameter | 28.35 in | 720.0 mm |
|---|---|---|
| Section width | 10.43 in | 265 mm |
| Sidewall height | 4.17 in | 106.0 mm |
| Circumference | 89.05 in | 2,262 mm |
| Revolutions | 711.5 per mile | 442.1 per km |
| Rim diameter | 20 in | 508.0 mm |
Compare 265/40R20 with another size
Alternative sizes on the same 20-inch wheel
Sizes in use within ±3 % of the overall diameter of 265/40R20:
Plus and minus sizes for 265/40R20
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 235/55R18 | Minus 2 (18 in) | 28.18 in | −0.60% |
| 285/45R18 | Minus 2 (18 in) | 28.10 in | −0.87% |
| 255/50R18 | Minus 2 (18 in) | 28.04 in | −1.08% |
| 275/45R18 | Minus 2 (18 in) | 27.74 in | −2.12% |
| 265/45R19 | Minus 1 (19 in) | 28.39 in | +0.15% |
| 295/40R19 | Minus 1 (19 in) | 28.29 in | −0.19% |
| 235/50R19 | Minus 1 (19 in) | 28.25 in | −0.33% |
| 245/50R19 | Minus 1 (19 in) | 28.65 in | +1.06% |
| 265/35R21 | Plus 1 (21 in) | 28.30 in | −0.15% |
| 315/30R21 | Plus 1 (21 in) | 28.44 in | +0.33% |
| 305/30R21 | Plus 1 (21 in) | 28.20 in | −0.50% |
| 275/35R21 | Plus 1 (21 in) | 28.58 in | +0.82% |
| 285/30R22 | Plus 2 (22 in) | 28.73 in | +1.36% |
| 295/30R22 | Plus 2 (22 in) | 28.97 in | +2.19% |
| 255/35R22 | Plus 2 (22 in) | 29.03 in | +2.40% |
Vehicles approved with 265/40R20 tires
Models whose Swiss type approval lists 265/40R20 as a standard or optional size (605 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 20-inch sizes
- 245/30R20 (−9.0%)
- 245/35R20 (−5.6%)
- 245/40R20 (−2.2%)
- 245/45R20 (+1.2%)
- 245/50R20 (+4.6%)
- 255/30R20 (−8.2%)
- 255/35R20 (−4.7%)
- 255/40R20 (−1.1%)
- 255/45R20 (+2.4%)
- 255/50R20 (+6.0%)
- 265/30R20 (−7.4%)
- 265/35R20 (−3.7%)
- 265/45R20 (+3.7%)
- 265/50R20 (+7.4%)
- 275/30R20 (−6.5%)
- 275/35R20 (−2.7%)
- 275/40R20 (+1.1%)
- 275/45R20 (+4.9%)
- 275/50R20 (+8.8%)
- 285/30R20 (−5.7%)
- 285/35R20 (−1.7%)
- 285/40R20 (+2.2%)
- 285/45R20 (+6.2%)
- 285/50R20 (+10.1%)
Reading the 265/40R20 size
- 265 — section width in millimetres (10.43 in).
- 40 — aspect ratio: the sidewall is 40 % of the width, 106.0 mm.
- R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
- 20 — fits a 20-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.