Comparison of tire sizes 155/80 R13 and 185/70 R13
155/80R13
155
Tire width 
80
Profile height 
R13
Tire diameter 
551
RPM per km 155mm124mm578mm1816mm
155
80
13
185
70
13
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 578 | 589 | +11 (+1.9%) | ||
| Width, mm | 155 | 185 | +30 (+19.4%) | ||
| Circumference, mm | 1816 | 1851 | +35 (+1.9%) | ||
| Profile height, mm | 124 | 130 | +6 (+4.8%) | ||
| RPM per km | 551 | 540 | -11 (-2%) | ||
| Clearance change, mm | +6 | ||||
| Result: | The diameter differs by 1.9%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 101.9 |
| Difference (km/h) | 1.9 |
Sizes for comparison of tires 155/80 R13
R13
R14 +1
R15 +2
Sizes for comparison of tires 185/70 R13
R13
R14 +1
R15 +2
