What do you have for brakes on this trailer?? I have 2 32' goosenecks flat beds, and a 36' aluminum stock trailer, with 10k HD dexter axels and I put electric over Kodiak hydralic disc brakes on them what a huge difference you don't even need truck brakes and they work just as well in reverse. You ever back down a gravel drive way with 10 tons of hay on??
It cost $550 (
www.kodiaktrailer.com) per axel, $350 (Redneck trailers) for the elec/hydo unit, and like $75 (NAPA)for brake lines, hoses and fitings.
They make an 11" and a 13" style rotor, also they use a 1 ton early 90's GM caliper so you can buy the brakes at any auto parts store. I run the 11" rotors on the trailer with the 16" rims and the 13" rotors on the with 19.5" rims.
Thats another thing I bought a bunch on 8 lug 19.5" GM P-chassie rims, had a machine shop cut the pilot hole to 4.75" and I use 225/75/19.5 14 ply tires and they where like iron. I buy them wholesale for $135 each. I must have 150,000 miles on my 19.5" trailer tires and they still have half tread, I think you can get 3-4 time more life out of the 19.5 then the 10 ply 235/85/16, also they are rated for 3600# dual as opposed to 2778# on the 16's.
As soon as I come up with more 19.5" rims I will out fit my other trailers with this set up, the also work well on pre '97 ford dullies.
happy hay hauling,
Jay