235/55R18 vs 245/50R19
Switching from 235/55R18 to 245/50R19 increases your tire's overall diameter by 1.7% (from 28.18" to 28.65"). At an indicated 60 mph, your actual speed would be about 61 mph.
235/55R18
Current- Overall diameter
- 28.18"
- Circumference
- 88.52"
- Sidewall height
- 5.09"
- Revolutions
- 716 /mile
245/50R19
New- Overall diameter
- 28.65" (+1.7%)
- Circumference
- 89.99" (+1.7%)
- Sidewall height
- 4.82"
- Revolutions
- 704 /mile