225/40R18 vs 265/30R19 tire size
265/30R19 vs 225/40R18, diameter
+0.7% taller
- Speedometer
- 59.6 mph
- At a true 60 mph
- Diameter
- 25.26 in
- Was 25.09 in
- Revs per mile
- 798
- Was 804
- 3% guideline
- Within
Car built for 225/40R18, now on 265/30R19.
225/40R18 and 265/30R19
| Measure | 225/40R18 | 265/30R19 | Difference |
|---|---|---|---|
| Width, mm | 225 | 265 | +40 |
| Sidewall, % of width | 40 | 30 | -10 |
| Rim, in | 18 | 19 | +1 |
| Section height, in | 3.54 | 3.13 | -0.41 |
| Diameter, in | 25.09 | 25.26 | +0.17 (+0.7%) |
| Circumference, in | 78.8 | 79.4 | +0.5 |
| Revs per mile | 804 | 798 | -6 (-0.7%) |
Fitting 265/30R19 instead of 225/40R18
Within the usual 3% diameter guideline.
- Needs 19 in wheels.
- 40 mm wider. Check rubbing at full lock.
Cars with 225/40R18
Cars with 265/30R19
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