Have made loads of trips over the years, open meetings, Scotland, Holland, Brittany, Denmark sometimes well loaded and have had very little tyre wear even on 8″ rims. A few years ago I swapped to 10″ rims and the ride was for sure even smoother. I had a new support cradle fitted to the trolley/trailer at the Welsh Harp Boat centre in London. I took the opportunity to have new wheel bearings fitted and they recommended 35lb pressures – I had been using 30lb. They seem to run pretty cool. I do check the wheel bearing grease most trips.
Ray