A2QFI
The images of the tyre scrubbing was a test that had the castoring third axle locked and then towed to the maximum "towing" limits. The tyres did not come off the rims. The story is in Flight International and when I locate the link I will post it for you.
parabellum
The danger of repeating "I heard such and such" without applying intellectual
rigger is of course getting shot 
- particularly on pprune. However, I did not shoot you, only provide a balanced question to test the integrity of the original source.
Cheers
TH