Comparison
255/55 R16 vs 215/45 R17
Compared to 255/55 R16, 215/45 R17 is 61.6 mm shorter and changes the speedometer reading by -8.97%.
Current Tire
255/55R16
New Tire
215/45R17
255/55 R16
215/45 R17
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-61.6 mm
-8.97%
Speedometer at 100
91.0 km/h
-8.97% error
Ground clearance
-30.8 mm
ride height delta
Sidewall change
-43.5 mm
revs/km: 509.1
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/compare/255-55-r16-vs-215-45-r17Detailed comparison
| Metric | 255/55 R16 | 215/45 R17 | Difference |
|---|---|---|---|
| Overall diameter | 686.9 mm | 625.3 mm | -61.6 mm (-8.97%) |
| Sidewall height | 140.3 mm | 96.8 mm | -43.5 mm |
| Circumference | 2.158 m | 1.964 m | -193.5 mm |
| Revs / km | 463.4 | 509.1 | +45.7 |
| Ground clearance | reference | -30.8 mm | -30.8 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 91.0 km/h | -8.97 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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255/55 R16
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215/45 R17