The Konig Unitour is specially designed for 4 wheel drive vehicles. The Konig Unitour is easy to use thanks to the tension chain and lever, and easy ten point tensioning. The Unitour features heavy duty heat treated 'D' section alloy cross chains. Snow chains warranty/guarantee does not cover any chains that are used on any vehicle that is fitted with wheels, tyres or a wheel/tyre size combination that is not approved to be fitted with snow chains by the manufacturer as per vehicle owner’s manual.For sizing please refer to our chain sizing chart http://bumps.com.au/Snow_Skate/Surf/Chain%20Size%20Chart