285/35R20 tire size
A 285/35R20 tire is 27.85 inches (707.5 mm) tall, 11.22 in (285 mm) wide and fits a 20-inch wheel. In inch notation it is roughly a 27.9x11.2R20 — a "28-inch" tire.
| Overall diameter | 27.85 in | 707.5 mm |
|---|---|---|
| Section width | 11.22 in | 285 mm |
| Sidewall height | 3.93 in | 99.8 mm |
| Circumference | 87.51 in | 2,223 mm |
| Revolutions | 724.1 per mile | 449.9 per km |
| Rim diameter | 20 in | 508.0 mm |
Compare 285/35R20 with another size
Alternative sizes on the same 20-inch wheel
Sizes in use within ±3 % of the overall diameter of 285/35R20:
Plus and minus sizes for 285/35R20
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 275/45R18 | Minus 2 (18 in) | 27.74 in | −0.40% |
| 255/50R18 | Minus 2 (18 in) | 28.04 in | +0.66% |
| 285/45R18 | Minus 2 (18 in) | 28.10 in | +0.88% |
| 265/45R18 | Minus 2 (18 in) | 27.39 in | −1.67% |
| 285/40R19 | Minus 1 (19 in) | 27.98 in | +0.44% |
| 255/45R19 | Minus 1 (19 in) | 28.04 in | +0.65% |
| 275/40R19 | Minus 1 (19 in) | 27.66 in | −0.69% |
| 295/40R19 | Minus 1 (19 in) | 28.29 in | +1.57% |
| 295/30R21 | Plus 1 (21 in) | 27.97 in | +0.41% |
| 285/30R21 | Plus 1 (21 in) | 27.73 in | −0.44% |
| 255/35R21 | Plus 1 (21 in) | 28.03 in | +0.62% |
| 305/30R21 | Plus 1 (21 in) | 28.20 in | +1.26% |
Vehicles approved with 285/35R20 tires
Models whose Swiss type approval lists 285/35R20 as a standard or optional size (647 approvals in total). Always check your own vehicle's placard or papers.
- BMW M8
- Mercedes-Benz S-Class
- Maserati Ghibli
- BMW M5
- Maserati Quattroporte
- Ferrari 488
- Ferrari 458
- Nissan GT-R
- Ferrari 296
- Maserati GranTurismo
- Ferrari Roma
- Maserati GranCabrio
- Ferrari California
- Ferrari GTC4
- Ferrari Portofino
- Ferrari F8
- McLaren 570S
- Ferrari FF
- McLaren 540C
- McLaren 600LT
- Maserati GT
- Mercedes-Benz EQE
- Maserati Levante
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
- 265/30R20 (−5.7%)
- 265/35R20 (−2.0%)
- 265/40R20 (+1.8%)
- 265/45R20 (+5.5%)
- 275/30R20 (−4.9%)
- 275/35R20 (−1.0%)
- 275/40R20 (+2.9%)
- 275/45R20 (+6.8%)
- 285/30R20 (−4.0%)
- 285/40R20 (+4.0%)
- 285/45R20 (+8.1%)
- 295/30R20 (−3.2%)
- 295/35R20 (+1.0%)
- 295/40R20 (+5.2%)
- 295/45R20 (+9.3%)
- 305/30R20 (−2.3%)
- 305/35R20 (+2.0%)
- 305/40R20 (+6.3%)
Reading the 285/35R20 size
- 285 — section width in millimetres (11.22 in).
- 35 — aspect ratio: the sidewall is 35 % of the width, 99.8 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.