The carry on the castelli rolling travel bag is designed for riders wanting a compact case to take on the plane or the team bus its 43 ltr capacity is packed into a diminutive external measurement of 35 x 54 x 25cm a size that meets most airline carry on requirements please check with your airline before flying the bag uses the same water and stain resistant materials semi rigid bottom for support and molded bottom skid plates as its big brother the xl low density wheels a request fro