Trailer Advice

[Highwayman]

Ditto on the torsion axels!!!

[Capt Terry]

Tom-
I'd say the most likely trailer failure on the road would be a tire or wheel bearing. I also carry a spare hub as you mentioned. And it will probably get you home. However, a new seal can quickly leak due to corrosion on the trailer spindle. Google Bearing Buddy Spindle Repair Kit to see a stainless steel ring to repair a corroded spindle- however because of its larger outer diameter it uses s special Seal from Bearing Buddy.
Another tip- with your tandem axle trailer, roll one wheel up on a thick piece of wood to remove the bad wheel.