Debica Presto UHP 2 is a summer tyre made in total of 49 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/40 R18 is 20mm wider than the narrowest dimension (205) and 30mm narrower than the widest one (255). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (225mm), which results in 90mm sidewall height. In 225/40 R18, there is only one possible speed index for Debica Presto UHP 2 - "Y", which is good for speeds up to 300 km/h.
225/40 R18 is found on 51 vehicles: