235/45 R16 doesn't belong to the most popular dimensions for summer tyres - there are 0 tyre models available, which can be compared to 155/60 R15, 170/60 R17, 160/60 R14. Let's break down the sizing - 45 is height of the tyre, which is calculated as 45% of the tyre width (235mm), which means the sidewall height has 105.75 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 1941.19 mm, which is very similar to 205/45 R17(1936.16 mm), 235/40 R17(1947.16 mm), 195/60 R15(1932.08 mm), 195/55 R16(1950.61 mm), 225/35 R18(1931.14 mm), 185/70 R14(1930.82 mm), 205/40 R18(1951.56 mm).