Comparison
265/50 R20 vs 285/35 R21
Compared to 265/50 R20, 285/35 R21 is 40.1 mm shorter and changes the speedometer reading by -5.19%.
Current Tire
265/50R20
New Tire
285/35R21
265/50 R20
285/35 R21
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-40.1 mm
-5.19%
Speedometer at 100
94.8 km/h
-5.19% error
Ground clearance
-20.1 mm
ride height delta
Sidewall change
-32.8 mm
revs/km: 434.3
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/compare/265-50-r20-vs-285-35-r21Detailed comparison
| Metric | 265/50 R20 | 285/35 R21 | Difference |
|---|---|---|---|
| Overall diameter | 773.0 mm | 732.9 mm | -40.1 mm (-5.19%) |
| Sidewall height | 132.5 mm | 99.8 mm | -32.8 mm |
| Circumference | 2.428 m | 2.302 m | -126.0 mm |
| Revs / km | 411.8 | 434.3 | +22.5 |
| Ground clearance | reference | -20.1 mm | -20.1 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 94.8 km/h | -5.19 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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285/35 R21