Coelacanth wrote:
Tires are new.
Iโll check the other.
Checking the tires involves getting them properly inflated for the load they are actually carrying.
Load the coach as you normally would for any trip and go to the CAT Scale. Take the results to the tire manufacturers load inflation table. Use these numbers to properly inflate each tire. DO NOT merely inflate to the max psi shown on the sidewalls and IGNORE the inflation stickers on the inside of the drivers side door.
When the front tires are overinflated you reduce the contact patch and the steering becomes "loosey goosey" not to mention very stiff and rough. The rear duals will take a different number. Any decent Class C should have two finger steering including when large trucks roar by or on windy days.
I have a 2012, 24' Nexus Phantom on the E-350 chassis with the V-10 andh a GVWR of 11,500#. I run at or near that max on every trip and my fronts are typically aired up to 60 psi with the rears at 65. I can literally take my hands off of the wheel {yes, I keep my fingers poised to retake control} and the coach will track like it is on rails. I often tow a 6 X 10' {8' tall} cargo trailer loaded up to 2,600 and the steering is just as smooth with it as without it.
The other excellent advice offered above is to get a proper alignment and you will likely need to increase the caster especially on the passenger side. As noted do not start throwing money searching for a solution for which there is no kn own problem {the government does this a lot... but I digress}. I bought our coach used with just 6,205 miles on it and unless the original owners had it realigned which I doubt, the only alignment that I know it has had was the last stop on the production line at the Nexus factory nearly 9 years ago.
We have put 60,000+ trouble free miles on the coach over the last 7+ years and yes we have hit every pothole from San Diego to Maine. I run nothing but Michelin's finest LT tires and other than one blowout on a 5.5 year old tire {my bad - replace your tires at 5 years folks} they have performed well. Before every trip I stop by Discount tire and have them inflated for the load they will carry {as this can vary} and inspected, they check tread depth and look for any visible issues. The service if free but please folks, tip these guys a couple of bucks.
At 33,000 miles I replaced the original shocks with heavy duty Bilstein's and the improvement was huge. When I started towing the heavier trailer I added AirLift 5K# air bags to deal with the extra tongue weight and level the trailer. Both of these improvements have worked very well.
As always... Opinions and YMMV.
:C
(photo taken from this post)
