Ok, I got another situation.
1. I recently acquired a frame pump that requires a considerable amount of force to pump up to on 40 psi, and I cannot get it over 70psi on my road tires. In fact, I have ripped two of my road tire with it.
2. So here is the question, is there a way to fix it? If not, should I keep it with my mountain bike? (it seems that those tubes are least fragile at the value then presta.) or should I just toss it? (I guess I could always toss at a driver if one barks at me.)