275/40R23 tire size
A 275/40R23 tire is 31.66 inches (804.2 mm) tall, 10.83 in (275 mm) wide and fits a 23-inch wheel. In inch notation it is roughly a 31.7x10.8R23 — a "32-inch" tire.
| Overall diameter | 31.66 in | 804.2 mm |
|---|---|---|
| Section width | 10.83 in | 275 mm |
| Sidewall height | 4.33 in | 110.0 mm |
| Circumference | 99.47 in | 2,526 mm |
| Revolutions | 637.0 per mile | 395.8 per km |
| Rim diameter | 23 in | 584.2 mm |
Compare 275/40R23 with another size
Alternative sizes on the same 23-inch wheel
Sizes in use within ±3 % of the overall diameter of 275/40R23:
Plus and minus sizes for 275/40R23
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 245/55R21 | Minus 2 (21 in) | 31.61 in | −0.16% |
| 275/50R21 | Minus 2 (21 in) | 31.83 in | +0.52% |
| 325/40R21 | Minus 2 (21 in) | 31.24 in | −1.34% |
| 285/45R21 | Minus 2 (21 in) | 31.10 in | −1.78% |
| 305/40R22 | Minus 1 (22 in) | 31.61 in | −0.17% |
| 275/45R22 | Minus 1 (22 in) | 31.74 in | +0.26% |
| 295/40R22 | Minus 1 (22 in) | 31.29 in | −1.17% |
| 285/45R22 | Minus 1 (22 in) | 32.10 in | +1.38% |
Vehicles approved with 275/40R23 tires
Models whose Swiss type approval lists 275/40R23 as a standard or optional size (5 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 23-inch sizes
Reading the 275/40R23 size
- 275 — section width in millimetres (10.83 in).
- 40 — aspect ratio: the sidewall is 40 % of the width, 110.0 mm.
- R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
- 23 — fits a 23-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.