255/60R19 vs 235/60R20 tire size
235/60R20 vs 255/60R19, diameter
+0.2% taller
- Speedometer
- 59.9 mph
- At a true 60 mph
- Diameter
- 31.10 in
- Was 31.05 in
- Revs per mile
- 648
- Was 650
- 3% guideline
- Within
Car built for 255/60R19, now on 235/60R20.
255/60R19 and 235/60R20
| Measure | 255/60R19 | 235/60R20 | Difference |
|---|---|---|---|
| Width, mm | 255 | 235 | -20 |
| Sidewall, % of width | 60 | 60 | 0 |
| Rim, in | 19 | 20 | +1 |
| Section height, in | 6.02 | 5.55 | -0.47 |
| Diameter, in | 31.05 | 31.10 | +0.06 (+0.2%) |
| Circumference, in | 97.5 | 97.7 | +0.2 |
| Revs per mile | 650 | 648 | -1 (-0.2%) |
Fitting 235/60R20 instead of 255/60R19
Within the usual 3% diameter guideline.
- Needs 20 in wheels.
Cars with 255/60R19
Cars with 235/60R20
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