I'm thinking about using mountain bike chains. I'll need about 5 chains per tread which is about 7.5mm wide per chain. This works quite well on rough terrain but tends to skid alot of slippery surfaces such as tiles.
On a conventional tread, if the tread comes off the whole thing becomes undrivable, whereas in the bike chain idea, if one chain comes off you still have 4 chains on that side.