235/50R18 vs 265/40R19 tire size
265/40R19 vs 235/50R18, diameter
+0.3% taller
- Speedometer
- 59.8 mph
- At a true 60 mph
- Diameter
- 27.35 in
- Was 27.25 in
- Revs per mile
- 738
- Was 740
- 3% guideline
- Within
Car built for 235/50R18, now on 265/40R19.
235/50R18 and 265/40R19
| Measure | 235/50R18 | 265/40R19 | Difference |
|---|---|---|---|
| Width, mm | 235 | 265 | +30 |
| Sidewall, % of width | 50 | 40 | -10 |
| Rim, in | 18 | 19 | +1 |
| Section height, in | 4.63 | 4.17 | -0.45 |
| Diameter, in | 27.25 | 27.35 | +0.09 (+0.3%) |
| Circumference, in | 85.6 | 85.9 | +0.3 |
| Revs per mile | 740 | 738 | -3 (-0.3%) |
Fitting 265/40R19 instead of 235/50R18
Within the usual 3% diameter guideline.
- Needs 19 in wheels.
- 30 mm wider. Check rubbing at full lock.
Cars with 235/50R18
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