Comparison
245/55 R16 vs 205/45 R17
Compared to 245/55 R16, 205/45 R17 is 59.6 mm shorter and changes the speedometer reading by -8.82%.
Current Tire
245/55R16
New Tire
205/45R17
245/55 R16
205/45 R17
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-59.6 mm
-8.82%
Speedometer at 100
91.2 km/h
-8.82% error
Ground clearance
-29.8 mm
ride height delta
Sidewall change
-42.5 mm
revs/km: 516.5
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/compare/245-55-r16-vs-205-45-r17Detailed comparison
| Metric | 245/55 R16 | 205/45 R17 | Difference |
|---|---|---|---|
| Overall diameter | 675.9 mm | 616.3 mm | -59.6 mm (-8.82%) |
| Sidewall height | 134.8 mm | 92.3 mm | -42.5 mm |
| Circumference | 2.123 m | 1.936 m | -187.2 mm |
| Revs / km | 470.9 | 516.5 | +45.5 |
| Ground clearance | reference | -29.8 mm | -29.8 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 91.2 km/h | -8.82 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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245/55 R16
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205/45 R17