Comparison of tire sizes 155/65 R15 and 165/75 R14
155/65R15
155
Tire width 
65
Profile height 
R15
Tire diameter 
546
RPM per km 155mm101mm583mm1830mm
155
65
15
165
75
14
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 583 | 603 | +20 (+3.4%) | ||
| Width, mm | 155 | 165 | +10 (+6.5%) | ||
| Circumference, mm | 1830 | 1895 | +65 (+3.6%) | ||
| Profile height, mm | 101 | 124 | +23 (+22.8%) | ||
| RPM per km | 546 | 528 | -18 (-3.3%) | ||
| Clearance change, mm | +10 | ||||
| Result: | The diameter differs by 3.4%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 103.6 |
| Difference (km/h) | 3.6 |
Sizes for comparison of tires 155/65 R15
R15
R14 -1
R16 +1
R13 -2
Sizes for comparison of tires 165/75 R14
R14
R13 -1
R15 +1
R16 +2