After destroying a wheel bearing on Maelstrom at Maidstone(with those big old external wheels) we thought wed ask what bearings are most suitable considering the loads involved. Current ones are a cage type design 20mm i/d 42mm o/d on the flange which recesses into the side plate of the gearbox. We can modify the gearbox side if necessary for a better bearing type. What technobots bearings (as they have selection of 20mm) would be better eg deep groove needle roller or the cast flange variety given the wheel arrangement we use.