245/45R20 tire size
A 245/45R20 tire is 28.68 inches (728.5 mm) tall, 9.65 in (245 mm) wide and fits a 20-inch wheel. In inch notation it is roughly a 28.7x9.6R20 — a "29-inch" tire.
| Overall diameter | 28.68 in | 728.5 mm |
|---|---|---|
| Section width | 9.65 in | 245 mm |
| Sidewall height | 4.34 in | 110.3 mm |
| Circumference | 90.10 in | 2,289 mm |
| Revolutions | 703.2 per mile | 436.9 per km |
| Rim diameter | 20 in | 508.0 mm |
Compare 245/45R20 with another size
Alternative sizes on the same 20-inch wheel
Sizes in use within ±3 % of the overall diameter of 245/45R20:
Plus and minus sizes for 245/45R20
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 225/60R18 | Minus 2 (18 in) | 28.63 in | −0.18% |
| 255/55R18 | Minus 2 (18 in) | 29.04 in | +1.26% |
| 235/60R18 | Minus 2 (18 in) | 29.10 in | +1.47% |
| 235/55R18 | Minus 2 (18 in) | 28.18 in | −1.76% |
| 245/50R19 | Minus 1 (19 in) | 28.65 in | −0.12% |
| 225/55R19 | Minus 1 (19 in) | 28.74 in | +0.22% |
| 275/45R19 | Minus 1 (19 in) | 28.74 in | +0.22% |
| 265/45R19 | Minus 1 (19 in) | 28.39 in | −1.02% |
| 245/40R21 | Plus 1 (21 in) | 28.72 in | +0.12% |
| 275/35R21 | Plus 1 (21 in) | 28.58 in | −0.36% |
| 285/35R21 | Plus 1 (21 in) | 28.85 in | +0.60% |
| 255/40R21 | Plus 1 (21 in) | 29.03 in | +1.22% |
| 285/30R22 | Plus 2 (22 in) | 28.73 in | +0.18% |
| 295/30R22 | Plus 2 (22 in) | 28.97 in | +1.00% |
| 255/35R22 | Plus 2 (22 in) | 29.03 in | +1.21% |
| 265/35R22 | Plus 2 (22 in) | 29.30 in | +2.17% |
Vehicles approved with 245/45R20 tires
Models whose Swiss type approval lists 245/45R20 as a standard or optional size (2,327 approvals in total). Always check your own vehicle's placard or papers.
- BMW X3
- BMW X4
- Land Rover Range Rover Evoque
- Audi A6
- Land Rover Discovery Sport
- Volvo XC40
- Porsche Taycan
- Ford Kuga
- Volvo V90
- Jaguar E-Pace
- Lexus LS500H
- Kg Mobility Torres
- Lexus LC500
- Leapmotor C10
- Chevrolet Camaro
- BMW iX3
- Lancia Thema
- Lexus LC500H
- Chrysler 300C
- Kg Mobility Actyon
- Renault Rafale
- Ford Mustang
- Cadillac XT4
- BYD Seal
- Audi E-tron
- Toyota Mirai
- Zeekr X
- Jeep GdCherokee
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
- 225/35R20 (−8.6%)
- 225/40R20 (−5.6%)
- 235/35R20 (−7.7%)
- 235/40R20 (−4.5%)
- 235/45R20 (−1.2%)
- 235/50R20 (+2.0%)
- 235/55R20 (+5.2%)
- 245/35R20 (−6.7%)
- 245/40R20 (−3.4%)
- 245/50R20 (+3.4%)
- 255/35R20 (−5.8%)
- 255/40R20 (−2.3%)
- 255/45R20 (+1.2%)
- 255/50R20 (+4.7%)
- 255/55R20 (+8.2%)
- 265/35R20 (−4.8%)
- 265/40R20 (−1.2%)
- 265/45R20 (+2.5%)
- 265/50R20 (+6.1%)
Reading the 245/45R20 size
- 245 — section width in millimetres (9.65 in).
- 45 — aspect ratio: the sidewall is 45 % of the width, 110.3 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.