Snow chains
The Transport Agency recommends you carry chains when travelling alpine passes and the central north island from June to September. If you see a'Chains essential'sign, this means you have to put them on.
The following video shows how to fit snow chains:
YouTube DVD provided by GO Rentals.
Snow socks
Snow socks are able to be used but with a warning –warning; they are not chainschains, and are suitable for short distances only and a travelling speed of 30km/h.