Comparison
225/60 R17 vs 215/45 R18
Compared to 225/60 R17, 215/45 R18 is 51.1 mm shorter and changes the speedometer reading by -7.28%.
Current Tire
225/60R17
New Tire
215/45R18
225/60 R17
215/45 R18
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-51.1 mm
-7.28%
Speedometer at 100
92.7 km/h
-7.28% error
Ground clearance
-25.5 mm
ride height delta
Sidewall change
-38.3 mm
revs/km: 489.2
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/compare/225-60-r17-vs-215-45-r18Detailed comparison
| Metric | 225/60 R17 | 215/45 R18 | Difference |
|---|---|---|---|
| Overall diameter | 701.8 mm | 650.7 mm | -51.1 mm (-7.28%) |
| Sidewall height | 135.0 mm | 96.8 mm | -38.3 mm |
| Circumference | 2.205 m | 2.044 m | -160.5 mm |
| Revs / km | 453.6 | 489.2 | +35.6 |
| Ground clearance | reference | -25.5 mm | -25.5 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 92.7 km/h | -7.28 km/h |
Verdict: danger
Over 5% diameter difference — likely to affect speedometer accuracy, ABS calibration and gearing. Not recommended without professional review.
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225/60 R17
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215/45 R18