215/45 R16 doesn't belong to the most popular dimensions for summer tyres - there are 26 tyre models available, which can be compared to 165/65 R15, 165/65 R14, 155/70 R13. Let's break down the sizing - 45 is height of the tyre, which is calculated as 45% of the tyre width (215mm), which means the sidewall height has 96.75 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 1884.64 mm, which is very similar to 175/70 R14(1886.84 mm), 195/50 R16(1889.35 mm), 185/60 R15(1894.38 mm), 185/65 R14(1872.7 mm), 215/40 R17(1896.89 mm), 205/40 R17(1871.76 mm), 195/55 R15(1870.82 mm). There are multiple speed indexes available for summer tyres in 215/45 R16: H(210km/h), V(240km/h), W(270km/h), Y(300km/h). The same goes for weight indexes: 86, 90. You can find 215/45 R16 on 7 car models - mainly Seat, Skoda, Audi, Ford, Volkswagen.