Comparison
255/55 R16 vs 205/50 R17
Compared to 255/55 R16, 205/50 R17 is 50.1 mm shorter and changes the speedometer reading by -7.29%.
Current Tire
255/55R16
New Tire
205/50R17
255/55 R16
205/50 R17
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-50.1 mm
-7.29%
Speedometer at 100
92.7 km/h
-7.29% error
Ground clearance
-25.1 mm
ride height delta
Sidewall change
-37.8 mm
revs/km: 499.9
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/compare/255-55-r16-vs-205-50-r17Detailed comparison
| Metric | 255/55 R16 | 205/50 R17 | Difference |
|---|---|---|---|
| Overall diameter | 686.9 mm | 636.8 mm | -50.1 mm (-7.29%) |
| Sidewall height | 140.3 mm | 102.5 mm | -37.8 mm |
| Circumference | 2.158 m | 2.001 m | -157.4 mm |
| Revs / km | 463.4 | 499.9 | +36.5 |
| Ground clearance | reference | -25.1 mm | -25.1 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 92.7 km/h | -7.29 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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205/50 R17