The tire (1) has an outwardly facing bearing surface and an inner lateral surface which is aligned to the rotational axis of the tire. A portion forms the inner lateral surface and is formed from a material. Another portion forms a part of the bearing surf...

The holder has a frame element (2) fixed at a motor car by a mounting portion (22). A carriage (4) comprises an engagement unit (42) for fastening a child seat and/or a baby shell at the carriage. The carriage is displaceably supported in a guide section (...