Comparison of tire sizes 175/65 R14 and 185/50 R16
175/65R14
175
Tire width 
65
Profile height 
R14
Tire diameter 
546
RPM per km 175mm114mm583mm1832mm
175
65
14
185
50
16
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 583 | 591 | +8 (+1.4%) | ||
| Width, mm | 175 | 185 | +10 (+5.7%) | ||
| Circumference, mm | 1832 | 1858 | +26 (+1.4%) | ||
| Profile height, mm | 114 | 93 | -21 (-18.4%) | ||
| RPM per km | 546 | 538 | -8 (-1.5%) | ||
| Clearance change, mm | +4 | ||||
| Result: | The diameter differs by 1.4%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 101.4 |
| Difference (km/h) | 1.4 |
Sizes for comparison of tires 175/65 R14
R14
R13 -1
R15 +1
R16 +2
Sizes for comparison of tires 185/50 R16
R16
R15 -1
R17 +1
R14 -2
R18 +2