Comparison of tire sizes 285/70 R17 and 275/65 R17
285/70R17
285
Tire width 
70
Profile height 
R17
Tire diameter 
383
RPM per km 285mm200mm831mm2610mm
285
70
17
275
65
17
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 831 | 789 | -42 (-5.1%) | ||
| Width, mm | 285 | 275 | -10 (-3.5%) | ||
| Circumference, mm | 2610 | 2480 | -130 (-5%) | ||
| Profile height, mm | 200 | 179 | -21 (-10.5%) | ||
| RPM per km | 383 | 403 | +20 (+5.2%) | ||
| Clearance change, mm | -21 | ||||
| Result: | The diameter differs by -5.1%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 95 |
| Difference (km/h) | -5 |
Sizes for comparison of tires 285/70 R17
R17
R16 -1
R18 +1
Sizes for comparison of tires 275/65 R17
R17
R16 -1
R18 +1
R19 +2
