Comparison of tire sizes 235/75 R15 and 225/70 R16
235/75R15
235
Tire width 
75
Profile height 
R15
Tire diameter 
434
RPM per km 235mm176mm734mm2304mm
235
75
15
225
70
16
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 734 | 721 | -13 (-1.8%) | ||
| Width, mm | 235 | 225 | -10 (-4.3%) | ||
| Circumference, mm | 2304 | 2266 | -38 (-1.6%) | ||
| Profile height, mm | 176 | 158 | -18 (-10.2%) | ||
| RPM per km | 434 | 441 | +7 (+1.6%) | ||
| Clearance change, mm | -7 | ||||
| Result: | The diameter differs by -1.8%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 98.4 |
| Difference (km/h) | -1.6 |
Sizes for comparison of tires 235/75 R15
R15
R16 +1
R17 +2
Sizes for comparison of tires 225/70 R16
R16
R15 -1
R17 +1
R18 +2