Comparison
235/50 R18 vs 255/35 R20
Compared to 235/50 R18, 255/35 R20 is 5.7 mm shorter and changes the speedometer reading by -0.82%.
Current Tire
235/50R18
New Tire
255/35R20
235/50 R18
255/35 R20
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
-5.7 mm
-0.82%
Speedometer at 100
99.2 km/h
-0.82% error
Ground clearance
-2.9 mm
ride height delta
Sidewall change
-28.3 mm
revs/km: 463.7
Permalink for this comparison:
/compare/235-50-r18-vs-255-35-r20Detailed comparison
| Metric | 235/50 R18 | 255/35 R20 | Difference |
|---|---|---|---|
| Overall diameter | 692.2 mm | 686.5 mm | -5.7 mm (-0.82%) |
| Sidewall height | 117.5 mm | 89.3 mm | -28.3 mm |
| Circumference | 2.175 m | 2.157 m | -17.9 mm |
| Revs / km | 459.9 | 463.7 | +3.8 |
| Ground clearance | reference | -2.9 mm | -2.9 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 99.2 km/h | -0.82 km/h |
Verdict: excellent
Within ±3% — speedometer, ABS and traction control should behave normally.
Back to
235/50 R18
Back to
255/35 R20