265/60R20 vs 305/50R20 tire size
305/50R20 vs 265/60R20, diameter
-1.6% shorter
- Speedometer
- 61.0 mph
- At a true 60 mph
- Diameter
- 32.01 in
- Was 32.52 in
- Revs per mile
- 630
- Was 620
- 3% guideline
- Within
Car built for 265/60R20, now on 305/50R20.
265/60R20 and 305/50R20
| Measure | 265/60R20 | 305/50R20 | Difference |
|---|---|---|---|
| Width, mm | 265 | 305 | +40 |
| Sidewall, % of width | 60 | 50 | -10 |
| Rim, in | 20 | 20 | 0 |
| Section height, in | 6.26 | 6.00 | -0.26 |
| Diameter, in | 32.52 | 32.01 | -0.51 (-1.6%) |
| Circumference, in | 102.2 | 100.6 | -1.6 |
| Revs per mile | 620 | 630 | +10 (+1.6%) |
Fitting 305/50R20 instead of 265/60R20
Within the usual 3% diameter guideline.
- 40 mm wider. Check rubbing at full lock.
Cars with 265/60R20
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