Trailer hubs

Lambert - Not much faster than a tractor, but only want to try a tested methed if possible (but thanks)

Jackonlyjack - I have never welded, but will have a look for Riccy trailer

Busta - Was just trying to get a matching set, so they could be interchangeable if needed. Hopefully making a trailer to put a RTT on (really fancy going to Norway). But, as long as I have a spare, it is not essential.

Cheers

On my trailer I got 4x100 to 5x5.5 spacers. As these bolt patterns interfere, you will need a double spacer. One inner with 4lug, then one outer with 5 lug and they are bolted together with a third unevenly spaced bolt set to combine. Not cheap.
The fact that a 4 lug and 5 lug pattern at more or less same diameter interfere, is also why redrilling the drums is not a good idea. Between two of the bolts there will be not enough material to make it strong enough.

I am not a fan of spacers so planning on making my own 4x100 wheels from a set of 15" Toyota steels and move the centers and reweld. 

By the way, welcome to Norway!
I do a bit of overlanding myself with the SJ trailer.

Yakuza - I think I will just get wheels and tyres to suit the trailer, will be my easiest route. Seen a lot of your pics on here, hoping to get the time for a decent trip myself. Looking to get to Norway when I can, visited on a cruise last year, great looking place.