155/70R19 vs 245/45R19 tire size
245/45R19 vs 155/70R19, diameter
+0.5% taller
- Speedometer
- 59.7 mph
- At a true 60 mph
- Diameter
- 27.68 in
- Was 27.54 in
- Revs per mile
- 729
- Was 732
- 3% guideline
- Within
Car built for 155/70R19, now on 245/45R19.
155/70R19 and 245/45R19
| Measure | 155/70R19 | 245/45R19 | Difference |
|---|---|---|---|
| Width, mm | 155 | 245 | +90 |
| Sidewall, % of width | 70 | 45 | -25 |
| Rim, in | 19 | 19 | 0 |
| Section height, in | 4.27 | 4.34 | +0.07 |
| Diameter, in | 27.54 | 27.68 | +0.14 (+0.5%) |
| Circumference, in | 86.5 | 87.0 | +0.4 |
| Revs per mile | 732 | 729 | -4 (-0.5%) |
Fitting 245/45R19 instead of 155/70R19
Within the usual 3% diameter guideline.
- 90 mm wider. Check rubbing at full lock.
Cars with 155/70R19
Cars with 245/45R19
What this cannot tell you
Diameter within 3% is a common shop guideline, not a maker spec.
Load index, offset and clearance are not in this data.
- Two or more sources agree
- One source
- Model-level or estimate
- Sources differ