215/60R17 vs 235/50R18 tire size
235/50R18 vs 215/60R17, diameter
+0.3% taller
- Speedometer
- 59.8 mph
- At a true 60 mph
- Diameter
- 27.25 in
- Was 27.16 in
- Revs per mile
- 740
- Was 743
- 3% guideline
- Within
Car built for 215/60R17, now on 235/50R18.
215/60R17 and 235/50R18
| Measure | 215/60R17 | 235/50R18 | Difference |
|---|---|---|---|
| Width, mm | 215 | 235 | +20 |
| Sidewall, % of width | 60 | 50 | -10 |
| Rim, in | 17 | 18 | +1 |
| Section height, in | 5.08 | 4.63 | -0.45 |
| Diameter, in | 27.16 | 27.25 | +0.09 (+0.3%) |
| Circumference, in | 85.3 | 85.6 | +0.3 |
| Revs per mile | 743 | 740 | -3 (-0.3%) |
Fitting 235/50R18 instead of 215/60R17
Within the usual 3% diameter guideline.
- Needs 18 in wheels.
- 20 mm wider. Check rubbing at full lock.
Cars with 215/60R17
Cars with 235/50R18
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