Snow chains are driving aids that are fitted on vehicle tyres. They are used to provide additional traction on snow-covered roads.
Summer tyres are car tyres designed especially for use in warmer weather.
The tyre is part of the tyre and wheel system and its job is to transmit the forces between the car and the road.
The wheel is part of the wheel and tyre system and its primary job is to support and transmit the forces between the hub and the tyres.
Winter tyres are car tyres designed especially for use in cold weather.