245/40 R17 - Best tyres 2025 - market overview, tests, reviews

245/40 R17 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 - 40 is height of the tyre, which is calculated as 40% of the tyre width (245mm), which means the sidewall height has 98 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 mm, which is very similar to 160/60 R14(1720.34 mm), 245/40 R18(2052.09 mm), 165/65 R14(1791.02 mm), 245/50 R18(2206.03 mm), 175/60 R14(1776.88 mm), 245/75 R16(2431.28 mm), 175/80 R14(1996.8 mm).