For the sake of sharing info, I'll give more details of this.
Speaking with the folk at Ark, it seems they are not aware of the fact the tyres fitted to these jockey wheels are of a different weight rating.
Makes you wonder what checks are made when they design and make them......
In addition, is seems there are next to no tyres on the market anywhere of this size which will take 360 kilos.
There are adds on evilbay for jockey wheels that look identical to the ark jockey wheel, but these have a weight rating on the tyre of about 70 kilos and have advertising of "Heavy Duty", Noice....
Now I understand why everyone bitches about pneumatic jockey wheels, they are overloaded from the start and will fail.
At this time, I am waiting for Ark to decide what they'll do about it, thing is, I want a Pneumatic Tyre for the CT.
Cheers
Dave