185/70R14
Overall diameter 614.6 mm
185/70R14 — 614.6 mm tall, and what it swaps with
185/70R14 is 185 mm wide with a 70% sidewall on a 14-inch wheel. That sidewall is 129.5 mm, so the tyre stands 614.6 mm tall and turns 517.9 times per kilometre.
- Section width
- 185 mm
- Aspect ratio
- 70 %
- Wheel size
- 14 in (355.6 mm)
- Sidewall height
- 129.5 mm
- Overall diameter
- 614.6 mm (24.2 in)
- Circumference
- 1930.8 mm
- Turns per km
- 517.9
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.
225/35R18614.7 mm · +0.02% you go faster195/60R15615 mm · +0.07% you go faster205/45R17616.3 mm · +0.28% you go faster205/50R16611.4 mm · -0.52% you go slower195/65R14609.1 mm · -0.89% you go slower175/65R15608.5 mm · -0.99% you go slower195/55R16620.9 mm · +1.03% you go faster185/65R15621.5 mm · +1.12% you go faster215/45R17625.3 mm · +1.74% you go faster195/70R13603.2 mm · -1.85% you go slower185/60R15603 mm · -1.89% you go slower205/60R15627 mm · +2.02% you go faster
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 185/70R14?
614.6 mm — the 355.6 mm wheel plus the 129.5 mm sidewall at top and bottom.
Q. How many turns per kilometre does 185/70R14 make?
Its circumference is 1930.8 mm, so 517.9 turns.
Q. What can I swap it for?
12 sizes stay within 3% of its diameter — the closest is 225/35R18 at 614.7 mm.
Q. Why is the sidewall 129.5 mm?
Because it is 70% of the 185 mm width. The aspect ratio is a proportion of the width, not a length.