175/70 R15 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 - 70 is height of the tyre, which is calculated as 70% of the tyre width (175mm), which means the sidewall height has 122.5 mm. The wheel diameter is R15, which means it fits to a 15 inch/381mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 265/40 R18
(2102.35 mm), 195/80 R15
(2177.12 mm), 265/50 R20
(2428.45 mm), 205/50 R16
(1920.77 mm), 265/75 R16
(2525.53 mm), 205/65 R15
(2034.18 mm), 275/40 R18
(2127.49 mm).
