Comparison of tire sizes 145/65 R15 and 165/80 R13
145/65R15
145
Tire width 
65
Profile height 
R15
Tire diameter 
559
RPM per km 145mm94mm570mm1789mm
145
65
15
165
80
13
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 570 | 594 | +24 (+4.2%) | ||
| Width, mm | 145 | 165 | +20 (+13.8%) | ||
| Circumference, mm | 1789 | 1867 | +78 (+4.4%) | ||
| Profile height, mm | 94 | 132 | +38 (+40.4%) | ||
| RPM per km | 559 | 536 | -23 (-4.1%) | ||
| Clearance change, mm | +12 | ||||
| Result: | The diameter differs by 4.2%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 104.4 |
| Difference (km/h) | 4.4 |
Sizes for comparison of tires 145/65 R15
R15
R14 -1
R16 +1
R13 -2
Sizes for comparison of tires 165/80 R13
R13
R14 +1
R15 +2