225/65R18 vs 245/55R19 tire size
245/55R19 vs 225/65R18, diameter
+0.3% taller
- Speedometer
- 59.8 mph
- At a true 60 mph
- Diameter
- 29.61 in
- Was 29.52 in
- Revs per mile
- 681
- Was 683
- 3% guideline
- Within
Car built for 225/65R18, now on 245/55R19.
225/65R18 and 245/55R19
| Measure | 225/65R18 | 245/55R19 | Difference |
|---|---|---|---|
| Width, mm | 225 | 245 | +20 |
| Sidewall, % of width | 65 | 55 | -10 |
| Rim, in | 18 | 19 | +1 |
| Section height, in | 5.76 | 5.31 | -0.45 |
| Diameter, in | 29.52 | 29.61 | +0.09 (+0.3%) |
| Circumference, in | 92.7 | 93.0 | +0.3 |
| Revs per mile | 683 | 681 | -2 (-0.3%) |
Fitting 245/55R19 instead of 225/65R18
Within the usual 3% diameter guideline.
- Needs 19 in wheels.
- 20 mm wider. Check rubbing at full lock.
Cars with 225/65R18
Cars with 245/55R19
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