but you could do that sort of thing wiv two knackered tyres,
but screws from the inside out, cut the bead of a smaller tyre that`ll fit inside "studded" tyre an tube inside that...
couple a spare old rims just fer norty norty snow,
then yer sorted..
it`ll just make lotsa sparts on dry roads tho`.....
now, where did i put that box a gold wood scews.......