Comparison
255/55 R16 vs 225/45 R17
Compared to 255/55 R16, 225/45 R17 is 52.6 mm shorter and changes the speedometer reading by -7.66%.
Current Tire
255/55R16
New Tire
225/45R17
255/55 R16
225/45 R17
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-52.6 mm
-7.66%
Speedometer at 100
92.3 km/h
-7.66% error
Ground clearance
-26.3 mm
ride height delta
Sidewall change
-39.0 mm
revs/km: 501.8
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/compare/255-55-r16-vs-225-45-r17Detailed comparison
| Metric | 255/55 R16 | 225/45 R17 | Difference |
|---|---|---|---|
| Overall diameter | 686.9 mm | 634.3 mm | -52.6 mm (-7.66%) |
| Sidewall height | 140.3 mm | 101.3 mm | -39.0 mm |
| Circumference | 2.158 m | 1.993 m | -165.2 mm |
| Revs / km | 463.4 | 501.8 | +38.4 |
| Ground clearance | reference | -26.3 mm | -26.3 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 92.3 km/h | -7.66 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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225/45 R17