255/65R19 vs 245/60R20 tire size
245/60R20 vs 255/65R19, diameter
-1.5% shorter
- Speedometer
- 60.9 mph
- At a true 60 mph
- Diameter
- 31.57 in
- Was 32.05 in
- Revs per mile
- 639
- Was 629
- 3% guideline
- Within
Car built for 255/65R19, now on 245/60R20.
255/65R19 and 245/60R20
| Measure | 255/65R19 | 245/60R20 | Difference |
|---|---|---|---|
| Width, mm | 255 | 245 | -10 |
| Sidewall, % of width | 65 | 60 | -5 |
| Rim, in | 19 | 20 | +1 |
| Section height, in | 6.53 | 5.79 | -0.74 |
| Diameter, in | 32.05 | 31.57 | -0.48 (-1.5%) |
| Circumference, in | 100.7 | 99.2 | -1.5 |
| Revs per mile | 629 | 639 | +9 (+1.5%) |
Fitting 245/60R20 instead of 255/65R19
Within the usual 3% diameter guideline.
- Needs 20 in wheels.
- Shorter sidewall: 0.7 in less.
Cars with 255/65R19
Cars with 245/60R20
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