265/55R19 vs 285/45R20 tire size
285/45R20 vs 265/55R19, diameter
-1.2% shorter
- Speedometer
- 60.8 mph
- At a true 60 mph
- Diameter
- 30.10 in
- Was 30.48 in
- Revs per mile
- 670
- Was 662
- 3% guideline
- Within
Car built for 265/55R19, now on 285/45R20.
265/55R19 and 285/45R20
| Measure | 265/55R19 | 285/45R20 | Difference |
|---|---|---|---|
| Width, mm | 265 | 285 | +20 |
| Sidewall, % of width | 55 | 45 | -10 |
| Rim, in | 19 | 20 | +1 |
| Section height, in | 5.74 | 5.05 | -0.69 |
| Diameter, in | 30.48 | 30.10 | -0.38 (-1.2%) |
| Circumference, in | 95.7 | 94.6 | -1.2 |
| Revs per mile | 662 | 670 | +8 (+1.3%) |
Fitting 285/45R20 instead of 265/55R19
Within the usual 3% diameter guideline.
- Needs 20 in wheels.
- 20 mm wider. Check rubbing at full lock.
- Shorter sidewall: 0.7 in less.
Cars with 265/55R19
Cars with 285/45R20
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