245/70 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 - 70 is height of the tyre, which is calculated as 70% of the tyre width (245mm), which means the sidewall height has 171.5 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 215/60 R16
(2087.27 mm), 285/30 R21
(2212.94 mm), 215/75 R16
(2289.91 mm), 285/40 R22
(2471.81 mm), 225/45 R17
(1992.71 mm), 295/30 R18
(1992.4 mm), 225/55 R18
(2213.88 mm).
