Abstract: A wheel supporting system for vehicles in which the wheel (1) is supported by a fork (10) with at least one bracket (10a, 10b), on which the wheel (1) is journalled rotatable round a horizontal axle. The fork (10) is turnable round a vertical axle and controllable by a turning mechanism (17). The turning mechanism with shock-absorbers (5, 19, 23-26) is vertically movable and fixed to a bracket (3, 32) which is vertically adjustable by means of shifting mechanisms (6, 20.22, 28-31), in relation to a support (4, 35) fixed to the chassis.

Abstract: A vehicle wheel with inflatable tyres, mounted on the same rim. One of the tyres (1), called a summer tyre, has tread suitable for summer use and at least one additional tyre (10), called a winter tyre, with a tread suitable for winter use. The winter tyre (or tyres) is mounted on the side of the summer tyre and is, in summer conditions, not fully inflated and hence not in contact with the road surface, because its circumference in its semi-inflated state has a shorter radius than that of the circumference of the summer tyre. The winter tyre (10) is securely attached to the outer surface of a concentric volume accumulator (7), which is part of the wheel rim and functions as a constantly available spare tyre. When inflated, the winter tyre (10) can expand, so that it has the same outer radius as the summer tyre (1) and thus also comes into contact with the road surface.