Comparison of tire sizes 275/35 R21 and 275/30 R20

275/35R21
275 Tire width
35 Profile height
R21 Tire diameter
439 RPM per km
275mm96mm726mm2280mm
275
35
21
275
30
20
Parameters Sizes Old New
Diameter, mm726673-53 (-7.3%)
Width, mm2752750 (0%)
Circumference, mm22802114-166 (-7.3%)
Profile height, mm9683-13 (-13.5%)
RPM per km439473+34 (+7.7%)
Clearance change, mm-27
Result:
The diameter differs by -7.3%.
Speedometer reading (km/h)
Real speed (km/h)92.7
Difference (km/h)-7.3

Sizes for comparison of tires 275/35 R21

R21
R20 -1
R22 +1
R19 -2

Sizes for comparison of tires 275/30 R20

R20
R19 -1
R21 +1
R18 -2

Ads by size 275/30 R20