A lot of the garage doors we work on in this area date to the 1960s and 70s, which means original rollers, or a first replacement set from years back, are well past their working life - nylon rollers typically don't last that long, and steel rollers with sealed bearings wear out from cycling, not from weather. The mild temperate climate here doesn't rust out hardware the way a harsher climate would, so when we find failed rollers on an older Bradenton door, it's almost always plain fatigue: thousands of open-close cycles on original parts that were never swapped. Humidity and salt air near the coast do accelerate corrosion on unsealed steel rollers faster than you'd see inland, which is why we see more pitted roller shafts on doors closer to the water. On newer builds in this area, roller wear shows up sooner if the door gets heavy daily use - more cycles simply wear a roller down quicker, regardless of the door's age.