Comparison of tire sizes 245/65 R17 and 255/60 R17

245/65R17
245 Tire width
65 Profile height
R17 Tire diameter
424 RPM per km
245mm159mm750mm2357mm
245
65
17
255
60
17
Parameters Sizes Old New
Diameter, mm750738-12 (-1.6%)
Width, mm245255+10 (+4.1%)
Circumference, mm23572318-39 (-1.7%)
Profile height, mm159153-6 (-3.8%)
RPM per km424431+7 (+1.7%)
Clearance change, mm-6
Result:
The diameter differs by -1.6%.
Speedometer reading (km/h)
Real speed (km/h)98.3
Difference (km/h)-1.7

Sizes for comparison of tires 245/65 R17

R17
R16 -1
R18 +1
R15 -2
R19 +2

Sizes for comparison of tires 255/60 R17

R17
R16 -1
R18 +1
R15 -2
R19 +2