155/70R13
Overall diameter 547.2 mm
155/70R13 — 547.2 mm tall, and what it swaps with
155/70R13 is 155 mm wide with a 70% sidewall on a 13-inch wheel. That sidewall is 108.5 mm, so the tyre stands 547.2 mm tall and turns 581.7 times per kilometre.
- Section width
- 155 mm
- Aspect ratio
- 70 %
- Wheel size
- 13 in (330.2 mm)
- Sidewall height
- 108.5 mm
- Overall diameter
- 547.2 mm (21.54 in)
- Circumference
- 1719.1 mm
- Turns per km
- 581.7
Sizes you can swap to
Only sizes whose overall diameter stays within 3% are listed. A different diameter covers a different distance per turn, and that gap becomes speedometer error.
Same profile, different width
Other sizes for this wheel
How the code reads
The 205 is millimetres, the 55 is a percentage of that width, and only the 16 is inches. The R stands for radial construction.
How to read this
- The first three digits are the width in mm, the middle two are the aspect ratio in percent, the last two the wheel in inches.
- Sidewall height = width × aspect ÷ 100. For 205/55 that is 112.75 mm.
- Overall diameter = wheel diameter + twice the sidewall. A 16-inch wheel is 406.4 mm.
- Once the diameter shifts by more than 3%, the speedometer and odometer drift by the same amount.
Frequently asked questions
Q. What is the overall diameter of 155/70R13?
547.2 mm — the 330.2 mm wheel plus the 108.5 mm sidewall at top and bottom.
Q. How many turns per kilometre does 155/70R13 make?
Its circumference is 1719.1 mm, so 581.7 turns.
Q. What can I swap it for?
4 sizes stay within 3% of its diameter — the closest is 165/65R13 at 544.7 mm.
Q. Why is the sidewall 108.5 mm?
Because it is 70% of the 155 mm width. The aspect ratio is a proportion of the width, not a length.