225/50 R16 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 (225mm), which means the sidewall height has 112.5 mm. The wheel diameter is R16, which means it fits to a 16 inch/406.4mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 160/60 R15(1800.13 mm), 245/40 R19(2131.88 mm), 165/65 R15(1870.82 mm), 245/50 R19(2285.82 mm), 175/60 R15(1856.68 mm), 255/30 R19(1996.8 mm), 180/55 R17(1978.58 mm). You can find 225/50 R16 on 10 car models - mainly BMW, Ford, Volvo, Audi, Jaguar.