I decided the start of this year to get my 2012 Ranger Trail trailers brake and bearing system checked out. I was having no issues but I was starting the 8th year of towing and I wanted to make sure everything was ok. I have already experienced two separate blowouts with ruined fenders running those Carlilse China bomb tires. The Vault system on the trailer has the 10 year warranty. The boat shop said there was no wobble with the tires and brake system was in good shape with no issues. They told me as part of their inspection they like to take the Vault system apart and check the bearings. I said if it is part of the inspection process go ahead and do it. The passenger side was fine and they said the bearings looked good and recommended to replace them at the 10 year mark. The second set showed that the outer bearing was getting ready to fail. So they replaced it and its companion bearing as well. Based on this experience, I do not think I will let the Vault system on my trailer go more than 5 years without having it serviced. I lucked out this time.