Debica Presto is a summer tyre made in total of 7 sizes, ranging from R14 to R14 - this particular dimension is R15, which means it fits to a 15 inch/381mm diameter wheel. 195/55 R15 is 10mm wider than the narrowest dimension (185) and 20mm narrower than the widest one (215). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (195mm), which results in 107.25mm sidewall height. In 195/55 R15, there is only one possible speed index for Debica Presto - "H", which is good for speeds up to 210 km/h. In 195/55 R15, Presto usually competes against N blue HD plus, which is a tyre from Nexen with a rating of %, compared to 0% of the Debica in question.