185/50 R14 doesn't belong to the most popular dimensions for summer tyres - there are 1 tyre models available, which can be compared to 155/60 R15, 170/60 R17, 160/60 R14. Let's break down the sizing - 50 is height of the tyre, which is calculated as 50% of the tyre width (185mm), which means the sidewall height has 92.5 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 1698.34 mm, which is very similar to 165/65 R13(1711.23 mm), 155/70 R13(1719.08 mm), 160/60 R14(1720.34 mm), 155/65 R13(1670.38 mm), 165/60 R14(1739.19 mm), 195/45 R15(1748.3 mm), 155/65 R14(1750.18 mm). There are multiple speed indexes available for summer tyres in 185/50 R14: V(240km/h). The same goes for weight indexes: 77.