Comparison
255/55 R18 vs 225/35 R19
Compared to 255/55 R18, 225/35 R19 is 97.6 mm shorter and changes the speedometer reading by -13.23%.
Current Tire
255/55R18
New Tire
225/35R19
255/55 R18
225/35 R19
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-97.6 mm
-13.23%
Speedometer at 100
86.8 km/h
-13.23% error
Ground clearance
-48.8 mm
ride height delta
Sidewall change
-61.5 mm
revs/km: 497.3
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/compare/255-55-r18-vs-225-35-r19Detailed comparison
| Metric | 255/55 R18 | 225/35 R19 | Difference |
|---|---|---|---|
| Overall diameter | 737.7 mm | 640.1 mm | -97.6 mm (-13.23%) |
| Sidewall height | 140.3 mm | 78.8 mm | -61.5 mm |
| Circumference | 2.318 m | 2.011 m | -306.6 mm |
| Revs / km | 431.5 | 497.3 | +65.8 |
| Ground clearance | reference | -48.8 mm | -48.8 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 86.8 km/h | -13.23 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 R18
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225/35 R19