205/60R17 vs 225/50R18 tire size
225/50R18 vs 205/60R17, diameter
+0.6% taller
- Speedometer
- 59.6 mph
- At a true 60 mph
- Diameter
- 26.86 in
- Was 26.69 in
- Revs per mile
- 751
- Was 756
- 3% guideline
- Within
Car built for 205/60R17, now on 225/50R18.
205/60R17 and 225/50R18
| Measure | 205/60R17 | 225/50R18 | Difference |
|---|---|---|---|
| Width, mm | 205 | 225 | +20 |
| Sidewall, % of width | 60 | 50 | -10 |
| Rim, in | 17 | 18 | +1 |
| Section height, in | 4.84 | 4.43 | -0.41 |
| Diameter, in | 26.69 | 26.86 | +0.17 (+0.6%) |
| Circumference, in | 83.8 | 84.4 | +0.5 |
| Revs per mile | 756 | 751 | -5 (-0.6%) |
Fitting 225/50R18 instead of 205/60R17
Within the usual 3% diameter guideline.
- Needs 18 in wheels.
- 20 mm wider. Check rubbing at full lock.
Cars with 225/50R18
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