Right, i know some track day tyres come with only 4-5mm tread from new.

if i was to buy a set at what point would i need to throw them away, assuming i keep them on a spare set of wheels so i dont need to drive them on the road.

have found a set for sale yokohama A048 but they only have 3.5mm and i was wondering whether it is worth getting them S/H?

car is a mk1 FRS and i want to use them for a couple of track days a year.

or would i be better off just compromising with some AD08 and get the full 8mm tread and use them all year round?

cheers