165/60 R14 tyres are commonly fitted to a number of small vehicles, and many of them are highly-efficient eco tyres, or inexpensive economy tyres. Whatever you choose, the size description has the same meaning. The 165 refers to the width of the tyre's cross-section, in millimetres - measured where the sidewalls are furthest apart.
Connected to the 165 is the aspect ratio indication, the number 60. This gives information about the height of this tyre's sidewalls - from the tread line, where it contacts the road, to the rim line. Here, sidewall height is equal to 60% of 165 mm, our given cross-section width.
Next we see a letter in this description. The R' marking designates a radial tyre, the most common constructive type for cars, crossovers, SUVs, and other light vehicles. The final number lets us know what size of rim is suitable for this tyre - in our case, 14 inch rims are needed.