Comparison
315/55 R16 vs 205/40 R17
Compared to 315/55 R16, 205/40 R17 is 157.1 mm shorter and changes the speedometer reading by -20.87%.
Current Tire
315/55R16
New Tire
205/40R17
315/55 R16
205/40 R17
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-157.1 mm
-20.87%
Speedometer at 100
79.1 km/h
-20.87% error
Ground clearance
-78.6 mm
ride height delta
Sidewall change
-91.3 mm
revs/km: 534.3
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/compare/315-55-r16-vs-205-40-r17Detailed comparison
| Metric | 315/55 R16 | 205/40 R17 | Difference |
|---|---|---|---|
| Overall diameter | 752.9 mm | 595.8 mm | -157.1 mm (-20.87%) |
| Sidewall height | 173.3 mm | 82.0 mm | -91.3 mm |
| Circumference | 2.365 m | 1.872 m | -493.5 mm |
| Revs / km | 422.8 | 534.3 | +111.5 |
| Ground clearance | reference | -78.6 mm | -78.6 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 79.1 km/h | -20.87 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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315/55 R16
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205/40 R17