Comparison of tire sizes 235/85 R16 and 275/60 R18
235/85R16
235
Tire width 
85
Profile height 
R16
Tire diameter 
395
RPM per km 235mm200mm806mm2532mm
235
85
16
275
60
18
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 806 | 787 | -19 (-2.4%) | ||
| Width, mm | 235 | 275 | +40 (+17%) | ||
| Circumference, mm | 2532 | 2473 | -59 (-2.3%) | ||
| Profile height, mm | 200 | 165 | -35 (-17.5%) | ||
| RPM per km | 395 | 404 | +9 (+2.3%) | ||
| Clearance change, mm | -10 | ||||
| Result: | The diameter differs by -2.4%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 97.7 |
| Difference (km/h) | -2.3 |
Sizes for comparison of tires 235/85 R16
R16
R17 +1
R18 +2
Sizes for comparison of tires 275/60 R18
R18
R17 -1
R19 +1
R16 -2
R20 +2
