185/60R13
Overall diameter 552.2 mm
185/60R13 — 552.2 mm tall, and what it swaps with
185/60R13 is 185 mm wide with a 60% sidewall on a 13-inch wheel. That sidewall is 111 mm, so the tyre stands 552.2 mm tall and turns 576.4 times per kilometre.
- Section width
- 185 mm
- Aspect ratio
- 60 %
- Wheel size
- 13 in (330.2 mm)
- Sidewall height
- 111 mm
- Overall diameter
- 552.2 mm (21.74 in)
- Circumference
- 1734.8 mm
- Turns per km
- 576.4
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.
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 185/60R13?
552.2 mm — the 330.2 mm wheel plus the 111 mm sidewall at top and bottom.
Q. How many turns per kilometre does 185/60R13 make?
Its circumference is 1734.8 mm, so 576.4 turns.
Q. What can I swap it for?
4 sizes stay within 3% of its diameter — the closest is 155/70R13 at 547.2 mm.
Q. Why is the sidewall 111 mm?
Because it is 60% of the 185 mm width. The aspect ratio is a proportion of the width, not a length.