235/60R19 vs 255/50R20 tire size
255/50R20 vs 235/60R19, diameter
-0.2% shorter
- Speedometer
- 60.1 mph
- At a true 60 mph
- Diameter
- 30.04 in
- Was 30.10 in
- Revs per mile
- 671
- Was 670
- 3% guideline
- Within
Car built for 235/60R19, now on 255/50R20.
235/60R19 and 255/50R20
| Measure | 235/60R19 | 255/50R20 | Difference |
|---|---|---|---|
| Width, mm | 235 | 255 | +20 |
| Sidewall, % of width | 60 | 50 | -10 |
| Rim, in | 19 | 20 | +1 |
| Section height, in | 5.55 | 5.02 | -0.53 |
| Diameter, in | 30.10 | 30.04 | -0.06 (-0.2%) |
| Circumference, in | 94.6 | 94.4 | -0.2 |
| Revs per mile | 670 | 671 | +1 (+0.2%) |
Fitting 255/50R20 instead of 235/60R19
Within the usual 3% diameter guideline.
- Needs 20 in wheels.
- 20 mm wider. Check rubbing at full lock.
- Shorter sidewall: 0.5 in less.
Cars with 235/60R19
Cars with 255/50R20
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