Gripmax Status Pro Winter is a winter tyre made in total of 102 sizes, ranging from R16 to R16 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 275/45 R21 is 100mm wider than the narrowest dimension (175) and 20mm narrower than the widest one (295). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (275mm), which results in 123.75mm sidewall height. In 275/45 R21, there is only one possible speed index for Gripmax Status Pro Winter - "V", which is good for speeds up to 240 km/h. In 275/45 R21, Status Pro Winter usually competes against SnowDragon UHP, which is a tyre from Imperial with a rating of 0%, compared to 0% of the Gripmax in question.