235/50R17 vs 245/40R19
245/40R19 is 12.0 mm taller than 235/50R17 in overall diameter (+1.8%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 245/40R19 fitted, the speedometer reads 100 km/h when you are doing 101.8 km/h.
Dimensions side by side
| 235/50R17 | 245/40R19 | |
|---|---|---|
| Overall diameter | 667 mm (26.3″) | 679 mm (26.7″) |
| Section width | 235 mm | 245 mm |
| Sidewall height | 118 mm | 98 mm |
| Rim | 17″ | 19″ |
| Revolutions per km | 477 | 469 |
| In stock | 15 tires from $118.00 | 56 tires from $125.00 |
What changes
- Overall diameter: 245/40R19 is 12.0 mm taller (+1.8%).
- Speedometer: reads 100 km/h at an actual 101.8 km/h with 245/40R19.
- 245/40R19 is 10 mm wider, so check clearance and the recommended rim width.
- Wheel size changes from 17″ 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 235/50R17
Vehicles that use 245/40R19
See every alternate size for 235/50R17
Frequently asked questions
Can I use 245/40R19 instead of 235/50R17?
Usually, yes: 245/40R19 is within 3% of the overall diameter of 235/50R17 (+1.8%). 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 235/50R17 and 245/40R19?
With 245/40R19 instead of 235/50R17, the speedometer shows 100 km/h when you are actually doing 101.8 km/h.
Which vehicles came with both 235/50R17 and 245/40R19?
Both sizes were original equipment, on different trims or packages, on the 2005–2007 Infiniti G35.