245/55R19 vs 265/45R20 tire size
265/45R20 vs 245/55R19, diameter
-0.7% shorter
- Speedometer
- 60.5 mph
- At a true 60 mph
- Diameter
- 29.39 in
- Was 29.61 in
- Revs per mile
- 686
- Was 681
- 3% guideline
- Within
Car built for 245/55R19, now on 265/45R20.
245/55R19 and 265/45R20
| Measure | 245/55R19 | 265/45R20 | Difference |
|---|---|---|---|
| Width, mm | 245 | 265 | +20 |
| Sidewall, % of width | 55 | 45 | -10 |
| Rim, in | 19 | 20 | +1 |
| Section height, in | 5.31 | 4.69 | -0.61 |
| Diameter, in | 29.61 | 29.39 | -0.22 (-0.7%) |
| Circumference, in | 93.0 | 92.3 | -0.7 |
| Revs per mile | 681 | 686 | +5 (+0.8%) |
Fitting 265/45R20 instead of 245/55R19
Within the usual 3% diameter guideline.
- Needs 20 in wheels.
- 20 mm wider. Check rubbing at full lock.
- Shorter sidewall: 0.6 in less.
Cars with 245/55R19
Cars with 265/45R20
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