The complaint is almost always the same: a grinding or rattling sound right as the door starts moving, worse on one side than the other, and sometimes a visible jerk where the door hesitates at the same spot on every cycle. On houses from Saratoga's 1967-era building wave, that spot is usually where the steel track has worn thin from decades of the original steel rollers. If you catch it early - noise but the door still travels straight - it's a clean roller swap. If you wait until the door is visibly crooked in the opening or catching hard enough that the opener strains against it, you're likely looking at track wear too. Either way, don't force it by hand or run the opener through the binding point repeatedly; that's how a roller problem turns into a bent track or a pulled bracket. More on the repair side of this, including when it's not a roller at all, is on our Saratoga repair page: /saratoga-garage-door-repair/.