225/80 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 - 80 is height of the tyre, which is calculated as 80% of the tyre width (225mm), which means the sidewall height has 180 mm. The wheel diameter is R15, which means it fits to a 15 inch/381mm diameter wheel. The total circumference of the tyre is 2327.92 mm, which is very similar to 235/55 R19(2328.23 mm), 295/35 R21(2324.46 mm), 235/60 R18(2322.27 mm), 285/45 R19(2321.95 mm), 225/75 R16(2337.03 mm), 255/70 R15(2318.5 mm), 295/40 R20(2337.34 mm).