265/60R20 vs 275/50R21 tire size
275/50R21 vs 265/60R20, diameter
-2.1% shorter
- Speedometer
- 61.3 mph
- At a true 60 mph
- Diameter
- 31.83 in
- Was 32.52 in
- Revs per mile
- 634
- Was 620
- 3% guideline
- Within
Car built for 265/60R20, now on 275/50R21.
265/60R20 and 275/50R21
| Measure | 265/60R20 | 275/50R21 | Difference |
|---|---|---|---|
| Width, mm | 265 | 275 | +10 |
| Sidewall, % of width | 60 | 50 | -10 |
| Rim, in | 20 | 21 | +1 |
| Section height, in | 6.26 | 5.41 | -0.85 |
| Diameter, in | 32.52 | 31.83 | -0.69 (-2.1%) |
| Circumference, in | 102.2 | 100.0 | -2.2 |
| Revs per mile | 620 | 634 | +14 (+2.2%) |
Fitting 275/50R21 instead of 265/60R20
Within the usual 3% diameter guideline.
- Needs 21 in wheels.
- Shorter sidewall: 0.8 in less.
Cars with 265/60R20
Cars with 275/50R21
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