Avon ZV7 is a summer tyre made in total of 279 sizes, ranging from R13 to R13 - this particular dimension is R15, which means it fits to a 15 inch/381mm diameter wheel. 175/65 R15 is 25mm wider than the narrowest dimension (150) and 100mm narrower than the widest one (275). This tyre profile of 65 means the sidewall height of the tyre is 65% of the tyre width (175mm), which results in 113.75mm sidewall height. In 175/65 R15, there are 2 possible speed indexes for Avon ZV7 - "T","H", which are good for speeds up to 190, 210 km/h. In 175/65 R15, ZV7 usually competes against N blue HD Plus, which is a tyre from Nexen with a rating of 0%, compared to 17% of the Avon in question.