A bent or misaligned track is why a door jams, grinds, or comes off its rollers mid-travel. It's rarely the track itself that's worn out -- usually something hit it.
Most bent tracks come from a vehicle bump or a roller that failed and let the door bind. We straighten minor bends on site and replace sections that are creased or torn rather than the full track, re-aligning against the door and checking rollers and hinges at the same time so the same failure doesn't repeat.