275/50R19 vs 245/50R20 tire size
245/50R20 vs 275/50R19, diameter
-0.6% shorter
- Speedometer
- 60.4 mph
- At a true 60 mph
- Diameter
- 29.65 in
- Was 29.83 in
- Revs per mile
- 680
- Was 676
- 3% guideline
- Within
Car built for 275/50R19, now on 245/50R20.
275/50R19 and 245/50R20
| Measure | 275/50R19 | 245/50R20 | Difference |
|---|---|---|---|
| Width, mm | 275 | 245 | -30 |
| Sidewall, % of width | 50 | 50 | 0 |
| Rim, in | 19 | 20 | +1 |
| Section height, in | 5.41 | 4.82 | -0.59 |
| Diameter, in | 29.83 | 29.65 | -0.18 (-0.6%) |
| Circumference, in | 93.7 | 93.1 | -0.6 |
| Revs per mile | 676 | 680 | +4 (+0.6%) |
Fitting 245/50R20 instead of 275/50R19
Within the usual 3% diameter guideline.
- Needs 20 in wheels.
- Shorter sidewall: 0.6 in less.
Cars with 245/50R20
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