Comparison of tire sizes 195/70 R15 and 235/50 R17
195/70R15
195
Tire width 
70
Profile height 
R15
Tire diameter 
487
RPM per km 195mm137mm654mm2055mm
195
70
15
235
50
17
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 654 | 667 | +13 (+2%) | ||
| Width, mm | 195 | 235 | +40 (+20.5%) | ||
| Circumference, mm | 2055 | 2095 | +40 (+1.9%) | ||
| Profile height, mm | 137 | 118 | -19 (-13.9%) | ||
| RPM per km | 487 | 477 | -10 (-2.1%) | ||
| Clearance change, mm | +7 | ||||
| Result: | The diameter differs by 2%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 101.9 |
| Difference (km/h) | 1.9 |
Sizes for comparison of tires 195/70 R15
R15
R14 -1
R16 +1
R17 +2
Sizes for comparison of tires 235/50 R17
R17
R16 -1
R18 +1
R15 -2
R19 +2