Our jockey wheel got buckled going up a farm track: does anybody know the correct diameter for the complete telescopic assembly? They seem to vary between 34mm and 60mm.
Just measure the diameter of the existing jockey wheel and buy an exact replacement with the same dimensions. That would be the easiest solution I would have thought.
The chassis may not be special but there are different ALKO JW designs - mount to side of chassis, mount centre of A frame, Premium JW totally different mounting from others.
So take it with you is sound advice