225/35R20 tire size
A 225/35R20 tire is 26.20 inches (665.5 mm) tall, 8.86 in (225 mm) wide and fits a 20-inch wheel. In inch notation it is roughly a 26.2x8.9R20.
| Overall diameter | 26.20 in | 665.5 mm |
|---|---|---|
| Section width | 8.86 in | 225 mm |
| Sidewall height | 3.10 in | 78.8 mm |
| Circumference | 82.31 in | 2,091 mm |
| Revolutions | 769.8 per mile | 478.3 per km |
| Rim diameter | 20 in | 508.0 mm |
Compare 225/35R20 with another size
Alternative sizes on the same 20-inch wheel
Sizes in use within ±3 % of the overall diameter of 225/35R20:
Plus and minus sizes for 225/35R20
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 235/45R18 | Minus 2 (18 in) | 26.33 in | +0.48% |
| 265/40R18 | Minus 2 (18 in) | 26.35 in | +0.56% |
| 255/40R18 | Minus 2 (18 in) | 26.03 in | −0.65% |
| 225/45R18 | Minus 2 (18 in) | 25.97 in | −0.87% |
| 265/35R19 | Minus 1 (19 in) | 26.30 in | +0.39% |
| 225/40R19 | Minus 1 (19 in) | 26.09 in | −0.44% |
| 255/35R19 | Minus 1 (19 in) | 26.03 in | −0.66% |
| 235/40R19 | Minus 1 (19 in) | 26.40 in | +0.77% |
Vehicles approved with 225/35R20 tires
Models whose Swiss type approval lists 225/35R20 as a standard or optional size (3,192 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
Reading the 225/35R20 size
- 225 — section width in millimetres (8.86 in).
- 35 — aspect ratio: the sidewall is 35 % of the width, 78.8 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.