225/40 R17 doesn't belong to the most popular dimensions for allround 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 - 40 is height of the tyre, which is calculated as 40% of the tyre width (225mm), which means the sidewall height has 90 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 1922.03 mm, which is very similar to 205/50 R16(1920.77 mm), 185/55 R16(1916.06 mm), 195/65 R14(1913.54 mm), 185/70 R14(1930.82 mm), 225/35 R18(1931.14 mm), 195/60 R15(1932.08 mm), 175/65 R15(1911.66 mm).