Comparison of tire sizes 185/70 R13 and 165/80 R13
185/70R13
185
Tire width 
70
Profile height 
R13
Tire diameter 
540
RPM per km 185mm130mm589mm1851mm
185
70
13
165
80
13
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 589 | 594 | +5 (+0.8%) | ||
| Width, mm | 185 | 165 | -20 (-10.8%) | ||
| Circumference, mm | 1851 | 1867 | +16 (+0.9%) | ||
| Profile height, mm | 130 | 132 | +2 (+1.5%) | ||
| RPM per km | 540 | 536 | -4 (-0.7%) | ||
| Clearance change, mm | +3 | ||||
| Result: | The diameter differs by 0.8%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 100.9 |
| Difference (km/h) | 0.9 |
Sizes for comparison of tires 185/70 R13
R13
R14 +1
R15 +2
Sizes for comparison of tires 165/80 R13
R13
R14 +1
R15 +2