Timeframe for repacking bearings

[KYAvion]

I greased the Avion’s bearing right at two years ago. I pulled the trailer on three short trips during the 15 months after I repacked them, and the trailer has sat for the remaining 9 months. I’ve got a short trip coming up (less than 5 hours towing one way), but I am really pressed for time right now. I know “they” say to repacked every 12 months, but I don’t really see the grease drying up or the seals dry rotting in such a short timeframe. Thoughts? Where’s this 12 month rule come from anyway?

[Salty]

Where’s this 12 month rule come from anyway?

Likely from the same place that says change the oil on your car every 3 months/2/3/5K miles.
I would think it would depend on the grease you used(Mobile 1, Lithium, ...) I would have to say there have been advances in lubricants in the last 30+years.
On the other hand, 5 hours of driving is what , 200 miles?
Some food for thought. Any grease coming out from behind the seals? If you pop the spindle covers, is the grease discolored?
Bottom line, if you're concerned enough to ask in the forum, odds are you may want to spot check them, if for nothing else, the peace of mind.

[KYAvion]

Those are good points. I’m not really that concerned about it, but thought I’d ask in case there might be something I was missing. Ordinarily I repacked them yearly, and each time they look good as new. I was just wondering about others experience, particularly those who tow relatively infrequently.