C10 A tread pattern for rear wheels of cross motorcycles for a semi-hard to hard terrain. C11 A tread pattern for front wheels of cross motorcycles for a semi-hard terrain. C12 A tread pattern for rear wheels of cross motorcycles for a semi-hard to soft terrain.C13 A tread pattern for front wheels of cross motorcycles for a semi-hard to soft terrain. C14 A tread pattern for rear wheels of cross motorcycles suitable particularly for a very soft terrain.
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