195/55R15
Overall diameter 595.5 mm
195/55R15 — 595.5 mm tall, and what it swaps with
195/55R15 is 195 mm wide with a 55% sidewall on a 15-inch wheel. That sidewall is 107.25 mm, so the tyre stands 595.5 mm tall and turns 534.5 times per kilometre.
- Section width
- 195 mm
- Aspect ratio
- 55 %
- Wheel size
- 15 in (381 mm)
- Sidewall height
- 107.25 mm
- Overall diameter
- 595.5 mm (23.44 in)
- Circumference
- 1870.8 mm
- Turns per km
- 534.5
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.
205/40R17595.8 mm · +0.05% you go faster185/65R14596.1 mm · +0.1% you go faster205/45R16590.9 mm · -0.77% you go slower175/70R14600.6 mm · +0.86% you go faster195/50R16601.4 mm · +0.99% you go faster195/60R14589.6 mm · -0.99% you go slower205/60R14601.6 mm · +1.02% you go faster185/70R13589.2 mm · -1.06% you go slower185/60R15603 mm · +1.26% you go faster195/70R13603.2 mm · +1.29% you go faster165/70R14586.6 mm · -1.49% you go slower185/55R15584.5 mm · -1.85% you go slower
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 195/55R15?
595.5 mm — the 381 mm wheel plus the 107.25 mm sidewall at top and bottom.
Q. How many turns per kilometre does 195/55R15 make?
Its circumference is 1870.8 mm, so 534.5 turns.
Q. What can I swap it for?
12 sizes stay within 3% of its diameter — the closest is 205/40R17 at 595.8 mm.
Q. Why is the sidewall 107.25 mm?
Because it is 55% of the 195 mm width. The aspect ratio is a proportion of the width, not a length.