Comparison of tire sizes 275/65 R17 and 245/70 R17
275/65R17
275
Tire width 
65
Profile height 
R17
Tire diameter 
403
RPM per km 275mm179mm789mm2480mm
275
65
17
245
70
17
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 789 | 775 | -14 (-1.8%) | ||
| Width, mm | 275 | 245 | -30 (-10.9%) | ||
| Circumference, mm | 2480 | 2434 | -46 (-1.9%) | ||
| Profile height, mm | 179 | 172 | -7 (-3.9%) | ||
| RPM per km | 403 | 411 | +8 (+2%) | ||
| Clearance change, mm | -7 | ||||
| Result: | The diameter differs by -1.8%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 98.1 |
| Difference (km/h) | -1.9 |
Sizes for comparison of tires 275/65 R17
R17
R16 -1
R18 +1
R19 +2
Sizes for comparison of tires 245/70 R17
R17
R16 -1
R18 +1
R15 -2
R19 +2