Comparison of tire sizes 275/50 R20 and 275/55 R20

275/50R20
275 Tire width
50 Profile height
R20 Tire diameter
407 RPM per km
275mm138mm783mm2460mm
275
50
20
275
55
20
Parameters Sizes Old New
Diameter, mm783811+28 (+3.6%)
Width, mm2752750 (0%)
Circumference, mm24602546+86 (+3.5%)
Profile height, mm138151+13 (+9.4%)
RPM per km407393-14 (-3.4%)
Clearance change, mm+14
Result:
The diameter differs by 3.6%.
Speedometer reading (km/h)
Real speed (km/h)103.5
Difference (km/h)3.5

Sizes for comparison of tires 275/50 R20

R20
R19 -1
R21 +1
R18 -2
R22 +2

Sizes for comparison of tires 275/55 R20

R20
R19 -1
R21 +1
R18 -2
R22 +2