Comparison of tire sizes 265/70 R15 and 245/75 R16

265/70R15
265 Tire width
70 Profile height
R15 Tire diameter
423 RPM per km
265mm186mm752mm2362mm
265
70
15
245
75
16
Parameters Sizes Old New
Diameter, mm752774+22 (+2.9%)
Width, mm265245-20 (-7.5%)
Circumference, mm23622431+69 (+2.9%)
Profile height, mm186184-2 (-1.1%)
RPM per km423411-12 (-2.8%)
Clearance change, mm+11
Result:
The diameter differs by 2.9%.
Speedometer reading (km/h)
Real speed (km/h)102.9
Difference (km/h)2.9

Sizes for comparison of tires 265/70 R15

R15
R16 +1
R17 +2

Sizes for comparison of tires 245/75 R16

R16
R15 -1
R17 +1
R18 +2