Dunlop Winter Sport 5 275/30 R21

Dunlop Winter Sport 5 is a winter tyre made in total of 191 sizes, ranging from R14 to R14 - 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 20mm narrower than the widest one (295). 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.