255/55R20 vs 265/55R20 tire size
265/55R20 vs 255/55R20, diameter
+1.4% taller
- Speedometer
- 59.2 mph
- At a true 60 mph
- Diameter
- 31.48 in
- Was 31.04 in
- Revs per mile
- 641
- Was 650
- 3% guideline
- Within
Car built for 255/55R20, now on 265/55R20.
255/55R20 and 265/55R20
| Measure | 255/55R20 | 265/55R20 | Difference |
|---|---|---|---|
| Width, mm | 255 | 265 | +10 |
| Sidewall, % of width | 55 | 55 | 0 |
| Rim, in | 20 | 20 | 0 |
| Section height, in | 5.52 | 5.74 | +0.22 |
| Diameter, in | 31.04 | 31.48 | +0.43 (+1.4%) |
| Circumference, in | 97.5 | 98.9 | +1.4 |
| Revs per mile | 650 | 641 | -9 (-1.4%) |
Fitting 265/55R20 instead of 255/55R20
Within the usual 3% diameter guideline.
Cars with 255/55R20
Cars with 265/55R20
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