Gripmax Pro Winter 275/30 R21

Gripmax Pro Winter is a tyre made in total of 97 sizes, ranging from R16 to R16 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 275/30 R21 is 100mm wider than the narrowest dimension (175) and 50mm narrower than the widest one (325). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (275mm), which results in 82.5mm sidewall height.