Comparison of tire sizes 155/80 R13 and 155/65 R15
155/80R13
155
Tire width 
80
Profile height 
R13
Tire diameter 
551
RPM per km 155mm124mm578mm1816mm
155
80
13
155
65
15
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 578 | 583 | +5 (+0.9%) | ||
| Width, mm | 155 | 155 | 0 (0%) | ||
| Circumference, mm | 1816 | 1830 | +14 (+0.8%) | ||
| Profile height, mm | 124 | 101 | -23 (-18.5%) | ||
| RPM per km | 551 | 546 | -5 (-0.9%) | ||
| Clearance change, mm | +3 | ||||
| Result: | The diameter differs by 0.9%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 100.8 |
| Difference (km/h) | 0.8 |
Sizes for comparison of tires 155/80 R13
R13
R14 +1
R15 +2
Sizes for comparison of tires 155/65 R15
R15
R14 -1
R16 +1
R13 -2
