235/55R19 vs 245/45R20
245/45R20 is 12.0 mm shorter than 235/55R19 in overall diameter (−1.6%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 245/45R20 fitted, the speedometer reads 100 km/h when you are doing 98.4 km/h.
Dimensions side by side
| 235/55R19 | 245/45R20 | |
|---|---|---|
| Overall diameter | 741 mm (29.2″) | 729 mm (28.7″) |
| Section width | 235 mm | 245 mm |
| Sidewall height | 129 mm | 110 mm |
| Rim | 19″ | 20″ |
| Revolutions per km | 430 | 437 |
| In stock | 126 tires from $178.00 | 52 tires from $167.00 |
What changes
- Overall diameter: 245/45R20 is 12.0 mm shorter (−1.6%).
- Speedometer: reads 100 km/h at an actual 98.4 km/h with 245/45R20.
- 245/45R20 is 10 mm wider, so check clearance and the recommended rim width.
- Wheel size changes from 19″ to 20″: you need wheels in the new size.
- Choose a load index at least as high as the one on your door placard.
Vehicles that came with both sizes
Vehicles that use 235/55R19
Vehicles that use 245/45R20
See every alternate size for 235/55R19
Frequently asked questions
Can I use 245/45R20 instead of 235/55R19?
Usually, yes: 245/45R20 is within 3% of the overall diameter of 235/55R19 (−1.6%). Use wheels of the right size and width, match or exceed the original load index, and check clearance at full steering lock.
How much does the speedometer change between 235/55R19 and 245/45R20?
With 245/45R20 instead of 235/55R19, the speedometer shows 100 km/h when you are actually doing 98.4 km/h.
Which vehicles came with both 235/55R19 and 245/45R20?
Both sizes were original equipment, on different trims or packages, on the 2021–2024 Toyota Mirai, 2020–2023 Dodge Charger, 2020–2022 Dodge Challenger, 2012–2019 Land Rover Range Rover Evoque, 2015–2019 Land Rover Discovery Sport, 2018–2019 Jaguar E-Pace.