Comparison
325/55 R16 vs 205/40 R17
Compared to 325/55 R16, 205/40 R17 is 168.1 mm shorter and changes the speedometer reading by -22.01%.
Current Tire
325/55R16
New Tire
205/40R17
325/55 R16
205/40 R17
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-168.1 mm
-22.01%
Speedometer at 100
78.0 km/h
-22.01% error
Ground clearance
-84.1 mm
ride height delta
Sidewall change
-96.8 mm
revs/km: 534.3
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/compare/325-55-r16-vs-205-40-r17Detailed comparison
| Metric | 325/55 R16 | 205/40 R17 | Difference |
|---|---|---|---|
| Overall diameter | 763.9 mm | 595.8 mm | -168.1 mm (-22.01%) |
| Sidewall height | 178.8 mm | 82.0 mm | -96.8 mm |
| Circumference | 2.400 m | 1.872 m | -528.1 mm |
| Revs / km | 416.7 | 534.3 | +117.6 |
| Ground clearance | reference | -84.1 mm | -84.1 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 78.0 km/h | -22.01 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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325/55 R16
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205/40 R17