185/55 R14 doesn't belong to the most popular dimensions for tyres - there are tyre models available, which can be compared to 325/30 R21, 155/60 R15, 155/65 R13. Let's break down the sizing - 55 is height of the tyre, which is calculated as 55% of the tyre width (185mm), which means the sidewall height has 101.75 mm. The wheel diameter is R14, which means it fits to a 14 inch/355.6mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 285/25 R20(2043.61 mm), 215/70 R16(2222.36 mm), 285/35 R22(2382.27 mm), 225/40 R18(2001.82 mm), 285/60 R18(2510.76 mm), 225/55 R16(2054.29 mm), 295/35 R20(2244.67 mm). You can find 185/55 R14 on 8 car models - mainly Volkswagen, CITROËN, Fiat, Ford, Mazda.