Next time we do a dive clean up I'll cut apart a bias ply tyre thats been on the bottom for 30+ years to see how the cords held up.
Can't see how the water would get to the cords if the tyre was uncracked (new) when it went down!
Maybe there's big money in salvaging 9.00 X 16 chevron tread tyres!
Mike (PADI IDST and Master Diver Trainer #202,398)
