235/50R21 vs 265/45R21 tire size
265/45R21 vs 235/50R21, diameter
+0.5% taller
- Speedometer
- 59.7 mph
- At a true 60 mph
- Diameter
- 30.39 in
- Was 30.25 in
- Revs per mile
- 664
- Was 667
- 3% guideline
- Within
Car built for 235/50R21, now on 265/45R21.
235/50R21 and 265/45R21
| Measure | 235/50R21 | 265/45R21 | Difference |
|---|---|---|---|
| Width, mm | 235 | 265 | +30 |
| Sidewall, % of width | 50 | 45 | -5 |
| Rim, in | 21 | 21 | 0 |
| Section height, in | 4.63 | 4.69 | +0.07 |
| Diameter, in | 30.25 | 30.39 | +0.14 (+0.5%) |
| Circumference, in | 95.0 | 95.5 | +0.4 |
| Revs per mile | 667 | 664 | -3 (-0.5%) |
Fitting 265/45R21 instead of 235/50R21
Within the usual 3% diameter guideline.
- 30 mm wider. Check rubbing at full lock.
Cars with 235/50R21
Cars with 265/45R21
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