225/55 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 - 55 is height of the tyre, which is calculated as 55% of the tyre width (225mm), which means the sidewall height has 123.75 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 205/55 R17(2064.97 mm), 275/35 R19(2120.89 mm), 205/80 R16(2307.19 mm), 275/45 R18(2213.88 mm), 215/50 R17(2031.98 mm), 275/65 R18(2559.46 mm), 215/65 R16(2154.82 mm). You can find 225/55 R16 on 23 car models - mainly Jaguar, Audi, BMW, Mazda, Peugeot.