Comparison
285/60 R18 vs 255/50 R19
Compared to 285/60 R18, 255/50 R19 is 61.6 mm shorter and changes the speedometer reading by -7.71%.
Current Tire
285/60R18
New Tire
255/50R19
285/60 R18
255/50 R19
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-61.6 mm
-7.71%
Speedometer at 100
92.3 km/h
-7.71% error
Ground clearance
-30.8 mm
ride height delta
Sidewall change
-43.5 mm
revs/km: 431.5
Permalink for this comparison:
/compare/285-60-r18-vs-255-50-r19Detailed comparison
| Metric | 285/60 R18 | 255/50 R19 | Difference |
|---|---|---|---|
| Overall diameter | 799.2 mm | 737.6 mm | -61.6 mm (-7.71%) |
| Sidewall height | 171.0 mm | 127.5 mm | -43.5 mm |
| Circumference | 2.511 m | 2.317 m | -193.5 mm |
| Revs / km | 398.3 | 431.5 | +33.3 |
| Ground clearance | reference | -30.8 mm | -30.8 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 92.3 km/h | -7.71 km/h |
Verdict: danger
Over 5% diameter difference — likely to affect speedometer accuracy, ABS calibration and gearing. Not recommended without professional review.
Back to
285/60 R18
Back to
255/50 R19