Toyo Open Country AT+ 275/50 R21

Toyo Open Country AT+ is a summer tyre made in total of 55 sizes, ranging from R13 to R13 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 275/50 R21 is 80mm wider than the narrowest dimension (195) and 20mm narrower than the widest one (295). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (275mm), which results in 137.5mm sidewall height.