205/50 R17 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 - 50 is height of the tyre, which is calculated as 50% of the tyre width (205mm), which means the sidewall height has 102.5 mm. The wheel diameter is R17, which means it fits to a 17 inch/431.8mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 305/30 R20(2170.84 mm), 235/35 R20(2112.72 mm), 235/50 R17(2094.81 mm), 235/60 R17(2242.47 mm), 155/60 R15(1781.28 mm), 245/30 R20(2057.74 mm), 160/60 R17(1959.73 mm). You can find 205/50 R17 on 35 car models - mainly CITROËN, Ford, BMW, Mazda, Peugeot.