Dunlop Winter Sport 5 is a winter tyre made in total of 403 sizes, ranging from R13 to R13 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 245/35 R21 is 185mm wider than the narrowest dimension (60) and -115mm narrower than the widest one (130). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (245mm), which results in 85.75mm sidewall height. In 245/35 R21, there is only one possible speed index for Dunlop Winter Sport 5 - "Y", which is good for speeds up to 300 km/h.
