155/65 R15 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 - 65 is height of the tyre, which is calculated as 65% of the tyre width (155mm), which means the sidewall height has 100.75 mm. The wheel diameter is R15, which means it fits to a 15 inch/381mm diameter wheel. The total circumference of the tyre is 1829.98 mm, which is very similar to 175/65 R14(1831.86 mm), 195/45 R16(1828.09 mm), 185/55 R15(1836.26 mm), 205/50 R15(1840.97 mm), 165/60 R15(1818.98 mm), 215/40 R16(1817.1 mm), 165/70 R14(1842.86 mm).