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315/30 R21 Bridgestone Turanza 6 variants
Bridgestone Turanza 6 is a summer tyre made in total of 115 sizes, ranging from R16 to R16 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 315/30 R21 is 120mm wider than the narrowest dimension (195) and -30mm narrower than the widest one (285). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (315mm), which results in 94.5mm sidewall height. In 315/30 R21, there is only one possible speed index for Bridgestone Turanza 6 - "Y", which is good for speeds up to 300 km/h.
Bridgestone Turanza 6 is made in 115 sizes, starting from 195/50 R16 up to 285/30 R22.