235/55R20 vs 265/50R20 tire size
265/50R20 vs 235/55R20, diameter
+0.8% taller
- Speedometer
- 59.5 mph
- At a true 60 mph
- Diameter
- 30.43 in
- Was 30.18 in
- Revs per mile
- 663
- Was 668
- 3% guideline
- Within
Car built for 235/55R20, now on 265/50R20.
235/55R20 and 265/50R20
| Measure | 235/55R20 | 265/50R20 | Difference |
|---|---|---|---|
| Width, mm | 235 | 265 | +30 |
| Sidewall, % of width | 55 | 50 | -5 |
| Rim, in | 20 | 20 | 0 |
| Section height, in | 5.09 | 5.22 | +0.13 |
| Diameter, in | 30.18 | 30.43 | +0.26 (+0.8%) |
| Circumference, in | 94.8 | 95.6 | +0.8 |
| Revs per mile | 668 | 663 | -6 (-0.8%) |
Fitting 265/50R20 instead of 235/55R20
Within the usual 3% diameter guideline.
- 30 mm wider. Check rubbing at full lock.
Cars with 235/55R20
Cars with 265/50R20
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