snow chains 
plural noun
A pair or set of meshes of metal chain, fitted around a vehicle’s tyres to give extra grip in snow.A revolutionary new product proven to be more effective than winter tyres or snow chains is now being stocked in Kendal....
- Travel to Greece and Turkey requires drivers to have vehicles equipped with snow chains in order to be allowed to cross the border.
- Our vehicle started sliding, so it was time to put snow chains on.