Comparison of tire sizes 265/65 R18 and 265/70 R17
265/65R18
265
Tire width 
65
Profile height 
R18
Tire diameter 
397
RPM per km 265mm172mm802mm2519mm
265
65
18
265
70
17
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 802 | 803 | +1 (+0.1%) | ||
| Width, mm | 265 | 265 | 0 (0%) | ||
| Circumference, mm | 2519 | 2522 | +3 (+0.1%) | ||
| Profile height, mm | 172 | 186 | +14 (+8.1%) | ||
| RPM per km | 397 | 396 | -1 (-0.3%) | ||
| Clearance change, mm | +1 | ||||
| Result: | The diameter differs by 0.1%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 100.1 |
| Difference (km/h) | 0.1 |
Sizes for comparison of tires 265/65 R18
R18
R17 -1
R19 +1
R16 -2
R20 +2
Sizes for comparison of tires 265/70 R17
R17
R16 -1
R18 +1
R19 +2
