A tire chain includes a side member. An attachment bracket is secured at a first end region to the side member. The attachment bracket is formed at a second end region with a slot and with a channel. A crosslink member has an endless link at one end. The endless link defines an opening and is located in the slot so that the opening intersects the channel. A rod extends through the channel and the opening of the endless link and is secured against removal from the channel, whereby the crosslink member is secured to the attachment bracket.

A vehicle tire includes a selectively actuated stud deployment system for increased traction. The studs are contained in cells in the surface of the tire and forced to deploy by pneumatic or fluid pressure. When the pressure is released, the studs retract.

Annular tire overlay (11) for drawing onto the rolling surface of tires (40), which has a tread (17) on its outside and a gripping surface (15) on its inside, which tire overlay (11) is so designed that contact between the rolling surface of the tire (40) and the surfacing of the road is prevented by the tire overlay (11) when the tire overlay has been drawn onto a tire. The said tire overlay (11) is provided with a flange (21) which stops the tire overlay (11) from shifting in the axial direction of the wheel. Advantageously, the tire overlay is additionally stiffened by a flange (21) of planar form to keep the contact area on the surface below small.