Carbon is widely used in motorsport, particularly in F1, but with strict limits. In karting, for example, it is forbidden in the construction of chassis. It may, instead, be used for seats, floor trays and chain covers, with a good weight saving and an increase in rigidity. In fact, carbon has elastic properties, and it is therefore resistant to bending and torsion, significantly higher than either steel, used to manufacture standards floor trays, and fibreglass, used for the seats. It is interesting how some companies have even dared to try and make wheel trims and pistons out of carbon composite, but were unsuccessful.