Comparison of tire sizes 265/70 R16 and 235/65 R18
265/70R16
265
Tire width 
70
Profile height 
R16
Tire diameter 
409
RPM per km 265mm186mm777mm2442mm
265
70
16
235
65
18
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 777 | 763 | -14 (-1.8%) | ||
| Width, mm | 265 | 235 | -30 (-11.3%) | ||
| Circumference, mm | 2442 | 2396 | -46 (-1.9%) | ||
| Profile height, mm | 186 | 153 | -33 (-17.7%) | ||
| RPM per km | 409 | 417 | +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 265/70 R16
R16
R15 -1
R17 +1
R18 +2
Sizes for comparison of tires 235/65 R18
R18
R17 -1
R19 +1
R16 -2
R20 +2