I am late to the party---sorry.
Welcome to the m416 world where nothing is wrong as long as you like it.
I found that to get 33's under mine I had to do a SOA which is easy to do. No negatives with a SOA as long as it lines up OK with the tow vehicle. If you want to keep the emergency brake you will have to get adapters for your lug pattern from US Adapters in Colorado. If you want to go with electric brakes just get a new axle to fit the pattern you need.
In regard to the stock axle here is some info:
Wheel Bearings (4 per trailer):
Federal Mogul Set A-35, which consists of:
Bearing: LM501349
Race: LM501310
Grease Seals (2 per trailer):
Federal-Mogul 472018
I have quite a few pictures and info on my build thread.
Have fun