Comparison
255/50 R19 vs 245/35 R20
Compared to 255/50 R19, 245/35 R20 is 58.1 mm shorter and changes the speedometer reading by -7.88%.
Current Tire
255/50R19
New Tire
245/35R20
255/50 R19
245/35 R20
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-58.1 mm
-7.88%
Speedometer at 100
92.1 km/h
-7.88% error
Ground clearance
-29.0 mm
ride height delta
Sidewall change
-41.8 mm
revs/km: 468.4
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/compare/255-50-r19-vs-245-35-r20Detailed comparison
| Metric | 255/50 R19 | 245/35 R20 | Difference |
|---|---|---|---|
| Overall diameter | 737.6 mm | 679.5 mm | -58.1 mm (-7.88%) |
| Sidewall height | 127.5 mm | 85.8 mm | -41.8 mm |
| Circumference | 2.317 m | 2.135 m | -182.5 mm |
| Revs / km | 431.5 | 468.4 | +36.9 |
| Ground clearance | reference | -29.0 mm | -29.0 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 92.1 km/h | -7.88 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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255/50 R19
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245/35 R20