Comparison
245/45 R20 vs 255/35 R20
Compared to 245/45 R20, 255/35 R20 is 42.0 mm shorter and changes the speedometer reading by -5.77%.
Current Tire
245/45R20
New Tire
255/35R20
245/45 R20
255/35 R20
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-42.0 mm
-5.77%
Speedometer at 100
94.2 km/h
-5.77% error
Ground clearance
-21.0 mm
ride height delta
Sidewall change
-21.0 mm
revs/km: 463.7
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/compare/245-45-r20-vs-255-35-r20Detailed comparison
| Metric | 245/45 R20 | 255/35 R20 | Difference |
|---|---|---|---|
| Overall diameter | 728.5 mm | 686.5 mm | -42.0 mm (-5.77%) |
| Sidewall height | 110.3 mm | 89.3 mm | -21.0 mm |
| Circumference | 2.289 m | 2.157 m | -131.9 mm |
| Revs / km | 436.9 | 463.7 | +26.7 |
| Ground clearance | reference | -21.0 mm | -21.0 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 94.2 km/h | -5.77 km/h |
Verdict: danger
Over 5% diameter difference — likely to affect speedometer accuracy, ABS calibration and gearing. Not recommended without professional review.
Back to
245/45 R20
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255/35 R20