Comparison
265/50 R20 vs 255/35 R21
Compared to 265/50 R20, 255/35 R21 is 61.1 mm shorter and changes the speedometer reading by -7.90%.
Current Tire
265/50R20
New Tire
255/35R21
265/50 R20
255/35 R21
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-61.1 mm
-7.90%
Speedometer at 100
92.1 km/h
-7.90% error
Ground clearance
-30.6 mm
ride height delta
Sidewall change
-43.3 mm
revs/km: 447.1
Permalink for this comparison:
/compare/265-50-r20-vs-255-35-r21Detailed comparison
| Metric | 265/50 R20 | 255/35 R21 | Difference |
|---|---|---|---|
| Overall diameter | 773.0 mm | 711.9 mm | -61.1 mm (-7.90%) |
| Sidewall height | 132.5 mm | 89.3 mm | -43.3 mm |
| Circumference | 2.428 m | 2.236 m | -192.0 mm |
| Revs / km | 411.8 | 447.1 | +35.3 |
| Ground clearance | reference | -30.6 mm | -30.6 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 92.1 km/h | -7.90 km/h |
Verdict: danger
Over 5% diameter difference — likely to affect speedometer accuracy, ABS calibration and gearing. Not recommended without professional review.
Back to
265/50 R20
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255/35 R21