235/50R18 vs 245/45R19
245/45R19 is 11.0 mm taller than 235/50R18 in overall diameter (+1.6%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 245/45R19 fitted, the speedometer reads 100 km/h when you are doing 101.6 km/h.
Dimensions side by side
| 235/50R18 | 245/45R19 | |
|---|---|---|
| Overall diameter | 692 mm (27.2″) | 703 mm (27.7″) |
| Section width | 235 mm | 245 mm |
| Sidewall height | 118 mm | 110 mm |
| Rim | 18″ | 19″ |
| Revolutions per km | 460 | 453 |
| In stock | 53 tires from $117.00 | 64 tires from $152.00 |
What changes
- Overall diameter: 245/45R19 is 11.0 mm taller (+1.6%).
- Speedometer: reads 100 km/h at an actual 101.6 km/h with 245/45R19.
- 245/45R19 is 10 mm wider, so check clearance and the recommended rim width.
- Wheel size changes from 18″ to 19″: 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 235/50R18
Vehicles that use 245/45R19
See every alternate size for 235/50R18
Frequently asked questions
Can I use 245/45R19 instead of 235/50R18?
Usually, yes: 245/45R19 is within 3% of the overall diameter of 235/50R18 (+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 235/50R18 and 245/45R19?
With 245/45R19 instead of 235/50R18, the speedometer shows 100 km/h when you are actually doing 101.6 km/h.
Which vehicles came with both 235/50R18 and 245/45R19?
Both sizes were original equipment, on different trims or packages, on the 2016–2019 Cadillac CT6, 2014–2019 Chevrolet Impala, 2015–2019 Lincoln MKC, 2014, 2016–2018 Maserati Ghibli, 2007–2017 Lexus LS, 2014–2016 Buick Lacrosse.