Comparison of tire sizes 305/70 R16 and 315/70 R17
305/70R16
305
Tire width 
70
Profile height 
R16
Tire diameter 
382
RPM per km 305mm214mm833mm2618mm
305
70
16
315
70
17
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 833 | 873 | +40 (+4.8%) | ||
| Width, mm | 305 | 315 | +10 (+3.3%) | ||
| Circumference, mm | 2618 | 2742 | +124 (+4.7%) | ||
| Profile height, mm | 214 | 221 | +7 (+3.3%) | ||
| RPM per km | 382 | 365 | -17 (-4.5%) | ||
| Clearance change, mm | +20 | ||||
| Result: | The diameter differs by 4.8%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 104.7 |
| Difference (km/h) | 4.7 |
Sizes for comparison of tires 305/70 R16
R16
R17 +1
R18 +2
Sizes for comparison of tires 315/70 R17
R17
R18 +1