Comparison
205/55 R16 vs 205/40 R17
Compared to 205/55 R16, 205/40 R17 is 36.1 mm shorter and changes the speedometer reading by -5.71%.
Current Tire
205/55R16
New Tire
205/40R17
205/55 R16
205/40 R17
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-36.1 mm
-5.71%
Speedometer at 100
94.3 km/h
-5.71% error
Ground clearance
-18.1 mm
ride height delta
Sidewall change
-30.8 mm
revs/km: 534.3
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/compare/205-55-r16-vs-205-40-r17Detailed comparison
| Metric | 205/55 R16 | 205/40 R17 | Difference |
|---|---|---|---|
| Overall diameter | 631.9 mm | 595.8 mm | -36.1 mm (-5.71%) |
| Sidewall height | 112.8 mm | 82.0 mm | -30.8 mm |
| Circumference | 1.985 m | 1.872 m | -113.4 mm |
| Revs / km | 503.7 | 534.3 | +30.5 |
| Ground clearance | reference | -18.1 mm | -18.1 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 94.3 km/h | -5.71 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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205/55 R16
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205/40 R17