275/45 R21 GT Radial Champiro WinterPro HP variants

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GT Radial Champiro WinterPro HP is a winter tyre made in total of 21 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 70mm wider than the narrowest dimension (205) and -20mm narrower than the widest one (255). 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, Radial Champiro WinterPro HP usually competes against Aspire XP Winter, which is a tyre from Apollo with a rating of 50%, compared to 49% of the GT in question.