Overnight I pulled the RIB from Somerset, through Glasgow, and to Campbeltown, stopped twice on the way for fuel etc, checked wheels and hubs each time, no real heat etc, all seemed fine. Last stop was just after Glasgow.
We finally got to our destination, and as we went through the gate to the causeway to the Island, one of the wheels of the trailer fell off!
It was very hot, sizzling noisily in the wet grass, so I guess the bearing had failed!
As we did not have too long to get across, we crawled over on 3 wheels!
Of course I had no spare hub, so will order 2 complete hubs!
Luckily we are here for at least 3 weeks, so we will launch as is, put the boat on the mooring and fix it.
Also pointed out was as though it was unlucky to have failed, at least it did so only a mile from the destination, and all off road.
Note to oneself, Always carry a spare hub!