I have a set of 35/12.5 15 Goodyear mt/r to have 10mm and to have 5mm, on steels one of the 5mm has a puncture in the side wall and I'm waiting for my tyre place to get me a tube,
If you want them make an offer, ( they have been used off road and have a few cuts all hold pressure beside the one that needs the tube, I'm based near Leeds Bradford airport,