Does anyone have any recommendations for tubes and tires for my 1985 Schwinn Traveler? I blew out one of the original tubes on my bike by inflating it to the max psi. It was just sitting in the garage a day later and the whole stem blew out. I have the Weinmann rims, as most of you probably know. Tires are original so the tread looks fine but the gum wall is dry and flaking off. I would like to stay with the 27x1.125. Do they still make gum wall or do I have to switch to all black?