Please read the winter driving section of your vehicle owner’s manual for further explanation. There are issues even when diamond pattern snow chain system is used on high performance 2WD or AWD “summer” tyres. On summer tyres snow chains will grip to the compacted snow/ice but the tyre can slip or spin within the chain even when chains are correctly fitted to the tyre. The problem is compounded by the camber of the road, the weight and torque of the vehicle and the amount of tread on the tyre. The problem is worse when the vehicle has been parked at the resort because of the low ambient temperature makes the tyres harder and therefore has even less grip to the chain.