I must be lucky. We've bought all of our trailers including three Jaycos, enjoyed them for 6-8 years and traded them for new and improved features like flat screen TV, bigger fridge, recliners etc. I haven't had a problem with running gear yet. I give all the pivot points in the suspension a couple drops of Mobil-1 5w-30 before each trip. Same with the hitch and stabilizers. Our newest Jayco has some decent looking Chinese tires on it with plenty of capacity for the weight of the trailer. So far at almost a year and maybe 4k miles, all is well. I keep them covered and it sits on a gravel bed. I get between 3-7 years out of tires before I notice the warning signs. Then I replace all five.