225/65R18 vs 245/60R18 tire size
245/60R18 vs 225/65R18, diameter
+0.2% taller
- Speedometer
- 59.9 mph
- At a true 60 mph
- Diameter
- 29.57 in
- Was 29.52 in
- Revs per mile
- 682
- Was 683
- 3% guideline
- Within
Car built for 225/65R18, now on 245/60R18.
225/65R18 and 245/60R18
| Measure | 225/65R18 | 245/60R18 | Difference |
|---|---|---|---|
| Width, mm | 225 | 245 | +20 |
| Sidewall, % of width | 65 | 60 | -5 |
| Rim, in | 18 | 18 | 0 |
| Section height, in | 5.76 | 5.79 | +0.03 |
| Diameter, in | 29.52 | 29.57 | +0.06 (+0.2%) |
| Circumference, in | 92.7 | 92.9 | +0.2 |
| Revs per mile | 683 | 682 | -1 (-0.2%) |
Fitting 245/60R18 instead of 225/65R18
Within the usual 3% diameter guideline.
- 20 mm wider. Check rubbing at full lock.
Cars with 225/65R18
Cars with 245/60R18
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