I have the original "Elec-Trak" branded tires on my E8M and I am really wanting to save them. They have significant dry rot cracks and do not hold air, I am afraid that if I try to use inner tubes that the tubes will bulge out of the cracks. I have researched "foaming" the tires for stability and support, and would try that...I think, but would gluing the cracks closed from the inside and then adding inner tubes be a better idea? I just don't know and don't want to spend the money on new tires. Any help on the matter is much appreciated!