Rough Ride

Do you have shocks on the 5er??

I don't know that I'd be so quick to write off possible issues and just say "It's the nature of the beast" until I did some actual checking. Heck, he hasn't even posted what he's pulling or what he's pulling it with. Yeah, I read the profile, but those don't always reflect present day vehicles.

You may have problems, but not everyone else has your same set of problems.

It’s the darn roads! Governments spend infrastructure money where th e votes are. The closer to the big city the better the highways.
Having had several trailers and fifth wheel cargo trailers too I highly recommend if you are going to switch out your axels go to 7000 lb. 0 degree Torflex axels. Far smoother ride.
Buying new...insist on them.

We got our Montana High Country (41 feet long) last September and it seems that almost everything in the 5er broke at one point in time or another. Not dishes and stuff, but things like door frames, the underskirting popped out, and the rear closest (along the back) shelf holding the cloths bar collapsed. Not to mention some other things that literally "broke".

I'm using the trailer exactly as it came from the factor, except for the tires. We did change them after a blow-out (yea, it finally happened to me). But the tires themselves did not make any difference in the rear bounce or anything. No noticeable difference anyway.

I have since repaired and fixed stuff myself. I've re-inforced a lot of stuff, structurally and cosmetically. I will admit, the last few times out, nothing has fallen off or fallen apart. So, my carpentry work must be good.

With a trailer of this length, the rear is simply going to move up and down. The front may move only a couple inches up and down hitched to the tow vehicle, but the length on the other end of the fulcrum can cause the rear to bounce up and down a foot or more, and it can be very forceful.

No, I don't think you have issues with your suspension or tires or set-up. It's just pure physics.... you hit a bump and the shear distance magnifies the bounce very aggressively.

Consider the roads you are driving, consider those expansion joint bumps at bridges on interstates, consider all the chuck holes, cracks and rough places your tires hit. In your tow vehicle, you have lots of suspension and shocks and a soft seat you sit on. You don't feel the bumps. Your tires do... but you don't.

Your trailer does not have all that type of suspension, springs, and shock absorbers to cushion the compartment riding on those tires. Every hit of the tires is a hit inside that box, we call a trailer.

The best we can do is keep a screwdriver, extra screws, duct tape, and bubble gum around to keep fixing paneled wall, door hinges, toilet seats, sliding glass windows, wooden cabinets, and it's contents.

My suggestion ... well, there are many... Number 1, take different roads... Nah! That's not an option. Number 2 ... pack your breakables better. Expect the worst, be grateful when the worst doesn't happen.

We've had things break too, not just the actual trailer, but items made of glass and ceramics. I know, it stinks, but the solution is to simply pack them when traveling with a lot more cushion around them, since your trailer doesn't have springs and shocks like your tow vehicle does.

Good luck. I feel for you there. I really do. I understand.

G ‘s are rated for up to 110 PSI so possibly at the lower pressure your running they wouldn’t Be as firm and may cause a bouncing effect from a softer tire. We used to run Goodyear G’s on a 15400 GVWR fifth wheel that had originally had E’ s on it and ran them at 110 psi. We never had any problems with bouncing or damage from a rough ride .

What's the trailer weigh? And what condition are the springs? Looking kind of flat maybe? Check to make sure your tires are not bottoming out on the trailer.

I run my Sailun's at 90-95 psi, on my triple axle 15,000 lb. toyhauler. I do get some bouncing, but not that bad unless the roads are really rough.

I don’t feel any vibration. It pulls sweet. It just bounces everything around. Didn’tnotice that with E rated tires at 80 pounds.

Sounds like you may need one or more tire balanced. The tires should not cause shaking unless they are out of balance or have an issue like bubble, separating bands or beginnings of tread separation