Ok I have a problem, yesterday I crashed into a concrete wall at 12 miles per hour. the clutch was engaged, front and right handles were squeezed, and feet were dragging on the ground. I was going down hill and could not get the bike to stop, even though I had done it before, the brakes on my bike had worn out too quick. It has stock pad breaks, and today I went to every bicycle shop in town looking for someone to put disk brakes on my front tire. but everyone said its impossible. anyone have any suggestions as to what I can do so i can stop before i hit the wall?