Y'all need to look at the build specs on that before speculating. 6.4 hemi, tons etc. NOT to say the vehicle is heavy enough for a gooseneck anyway, but it is not a under matched as it may look at first glance. I still wouldn't do it. They day the fire emanated from the fuse box. Black Ops build...
The road noise is not bad at all, it is there but after 40 miles an hour the wind noise against the super flat gladiator takes over. FYI I have ran the Km2s (below) as well and they were great, but not as refined as the km3. All mud tires have come a long way in the last 10 years.
I have 37in KM3 that we originally balanced by 4WP with balance beads and they vibrated more than I cared for at highway speeds. I had them dismounted and rebalanced by a local tire shop with stick-ons and it has been butter smooth since. The installer has a lot to do with it. BTW I should have...
IMO the long proportions of the gladiator need at least a 37. Many on here regret going 35s and look forward to replacing them with 37s, just search. I got 37s and wish I went 39 bfg. If you have over owned a boat, then you know this as two foot-itis.
It is your money, but keep in mind American manufacturing jobs are very stressed right now.
Cooper = made in USA
Mastercraft = made in USA
Milestar = made in Taiwan
By the way, i run the 37 bfgs so i can fit the soare underneath. You are right, they are a shorter 37, but that suited my needs.
This is crazy to hear about the issues with the new box. From what you describe I would think the steer smarts drag link with attenuator would be worth looking at.