I went through three tubes in 15 minutes
I changed my worn tire for a new Conti. It is smooth and clean on the inside. My rim is clean and free of debris. Rim tape is in perfect condition. It is going on a 1982 27 inch clincher rim that appears to be "like new". Every time fill it up it explodes on the side opposite the valve stem. It blows the tire right off the rim
I got the bike second hand and it held air in the previous tire w/o problem. It almost seems as if the tire is not hooking on the bead.
It is a Japanese Bunchi Road bike.
Any idea on what might be causing this?