Comparison of tire sizes 165/75 R14 and 185/70 R13
165/75R14
165
Tire width 
75
Profile height 
R14
Tire diameter 
528
RPM per km 165mm124mm603mm1895mm
165
75
14
185
70
13
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 603 | 589 | -14 (-2.3%) | ||
| Width, mm | 165 | 185 | +20 (+12.1%) | ||
| Circumference, mm | 1895 | 1851 | -44 (-2.3%) | ||
| Profile height, mm | 124 | 130 | +6 (+4.8%) | ||
| RPM per km | 528 | 540 | +12 (+2.3%) | ||
| Clearance change, mm | -7 | ||||
| Result: | The diameter differs by -2.3%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 97.7 |
| Difference (km/h) | -2.3 |
Sizes for comparison of tires 165/75 R14
R14
R13 -1
R15 +1
R16 +2
Sizes for comparison of tires 185/70 R13
R13
R14 +1
R15 +2