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245/40 R21 Michelin Primacy 4+ variants
Michelin Primacy 4+ is a summer tyre made in total of 122 sizes, ranging from R16 to R16 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 245/40 R21 is 60mm wider than the narrowest dimension (185) and 0mm narrower than the widest one (245). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (245mm), which results in 98mm sidewall height. In 245/40 R21, there is only one possible speed index for Michelin Primacy 4+ - "W", which is good for speeds up to 270 km/h.
Michelin Primacy 4+ is made in 122 sizes, starting from 185/50 R16 up to 245/40 R21.