Continental SportContact 6 SUV 315/40 R21

Continental SportContact 6 SUV is a summer tyre made in total of 12 sizes, ranging from R21 to R21 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 315/40 R21 is 40mm wider than the narrowest dimension (275) and 20mm narrower than the widest one (335). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (315mm), which results in 126mm sidewall height.