I would appreciate your advice. I have a Land Rover Discovery 3 fitted with standard mud and snow all-weather tyres. I have two or three ski trips planned and have heard that winter snow tyres would meet my needs in most conditioners avoiding chains. Is it best to fit these rather than all weather tyres? If I stick with the current tyres and take snow chains there appears to be controversy on which wheels to fit the chains and Land Rover says only its more expensive, chains are suitable. What is the problem of using winter tyres in summer?