My 80's Raleigh road bike has 700c wheels on it now, and the rear wheel is wide for the width of the dropouts. They have to be flexed out in order to get the wheel to slide in. At home, it's a little bit of a pain, but doable. However, if I was to have a flat out somewhere and I needed to change the rear tube, I might be in trouble. Is there a way to permanently bend the frame so that it will fit the rear wheel smoothly?