Comparison
185/70 R14 vs 185/55 R15
Compared to 185/70 R14, 185/55 R15 is 30.1 mm shorter and changes the speedometer reading by -4.90%.
Current Tire
185/70R14
New Tire
185/55R15
185/70 R14
185/55 R15
Ground line · scaled comparison
Slight Difference
Within ±5% — usable, recalibration recommended
Diameter change
-30.1 mm
-4.90%
Speedometer at 100
95.1 km/h
-4.90% error
Ground clearance
-15.0 mm
ride height delta
Sidewall change
-27.8 mm
revs/km: 544.6
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/compare/185-70-r14-vs-185-55-r15Detailed comparison
| Metric | 185/70 R14 | 185/55 R15 | Difference |
|---|---|---|---|
| Overall diameter | 614.6 mm | 584.5 mm | -30.1 mm (-4.90%) |
| Sidewall height | 129.5 mm | 101.8 mm | -27.8 mm |
| Circumference | 1.931 m | 1.836 m | -94.6 mm |
| Revs / km | 517.9 | 544.6 | +26.7 |
| Ground clearance | reference | -15.0 mm | -15.0 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 95.1 km/h | -4.90 km/h |
Verdict: warning
Between 3% and 5% — noticeable speedometer drift; recalibration may be advisable.
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185/70 R14
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185/55 R15