Comparison
215/60 R17 vs 225/40 R18
Compared to 215/60 R17, 225/40 R18 is 52.6 mm shorter and changes the speedometer reading by -7.63%.
Current Tire
215/60R17
New Tire
225/40R18
215/60 R17
225/40 R18
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-52.6 mm
-7.63%
Speedometer at 100
92.4 km/h
-7.63% error
Ground clearance
-26.3 mm
ride height delta
Sidewall change
-39.0 mm
revs/km: 499.5
Permalink for this comparison:
/compare/215-60-r17-vs-225-40-r18Detailed comparison
| Metric | 215/60 R17 | 225/40 R18 | Difference |
|---|---|---|---|
| Overall diameter | 689.8 mm | 637.2 mm | -52.6 mm (-7.63%) |
| Sidewall height | 129.0 mm | 90.0 mm | -39.0 mm |
| Circumference | 2.167 m | 2.002 m | -165.2 mm |
| Revs / km | 461.5 | 499.5 | +38.1 |
| Ground clearance | reference | -26.3 mm | -26.3 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 92.4 km/h | -7.63 km/h |
Verdict: danger
Over 5% diameter difference — likely to affect speedometer accuracy, ABS calibration and gearing. Not recommended without professional review.
Back to
215/60 R17
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225/40 R18