Comparison of tire sizes 285/75 R16 and 275/70 R18

285/75R16
285 Tire width
75 Profile height
R16 Tire diameter
382 RPM per km
285mm214mm834mm2620mm
285
75
16
275
70
18
Parameters Sizes Old New
Diameter, mm834842+8 (+1%)
Width, mm285275-10 (-3.5%)
Circumference, mm26202646+26 (+1%)
Profile height, mm214193-21 (-9.8%)
RPM per km382378-4 (-1%)
Clearance change, mm+4
Result:
The diameter differs by 1%.
Speedometer reading (km/h)
Real speed (km/h)101
Difference (km/h)1

Sizes for comparison of tires 285/75 R16

R16
R17 +1
R18 +2

Sizes for comparison of tires 275/70 R18

R18
R17 -1
R16 -2
R20 +2