Comparison of tire sizes 315/70 R17 and 305/70 R16
315/70R17
315
Tire width 
70
Profile height 
R17
Tire diameter 
365
RPM per km 315mm221mm873mm2742mm
315
70
17
305
70
16
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 873 | 833 | -40 (-4.6%) | ||
| Width, mm | 315 | 305 | -10 (-3.2%) | ||
| Circumference, mm | 2742 | 2618 | -124 (-4.5%) | ||
| Profile height, mm | 221 | 214 | -7 (-3.2%) | ||
| RPM per km | 365 | 382 | +17 (+4.7%) | ||
| Clearance change, mm | -20 | ||||
| Result: | The diameter differs by -4.6%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 95.5 |
| Difference (km/h) | -4.5 |
Sizes for comparison of tires 315/70 R17
R17
R18 +1
Sizes for comparison of tires 305/70 R16
R16
R17 +1
R18 +2
