Comparison of tire sizes 265/70 R18 and 265/65 R18
265/70R18
265
Tire width 
70
Profile height 
R18
Tire diameter 
384
RPM per km 265mm186mm828mm2602mm
265
70
18
265
65
18
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 828 | 802 | -26 (-3.1%) | ||
| Width, mm | 265 | 265 | 0 (0%) | ||
| Circumference, mm | 2602 | 2519 | -83 (-3.2%) | ||
| Profile height, mm | 186 | 172 | -14 (-7.5%) | ||
| RPM per km | 384 | 397 | +13 (+3.4%) | ||
| Clearance change, mm | -13 | ||||
| Result: | The diameter differs by -3.1%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 96.8 |
| Difference (km/h) | -3.2 |
Sizes for comparison of tires 265/70 R18
R18
R17 -1
R16 -2
R20 +2
Sizes for comparison of tires 265/65 R18
R18
R17 -1
R19 +1
R16 -2
R20 +2