I think your onto something there Rod.....
I think the fact that Bullbars are mounted on the end of the chassis rail plus including the extra concertina style crush tube mounts the likes of ARB bars have makes them hang out very far forwards.....
this extra distance adds like a cantilever and Im not that engineering qualified so bear with me here....
At the end of the chassis rail, the bar may weigh for example 50kgs.....add another 20-25cm or whatever these crush tube mounts are would increase the weight at the end to the equivalent of 60-65kgs.....Im not sure exactly, maybe theres an engineer here that can help? I knew the formulas back in 1st year uni......
What I think many bullbar manufacturers would and should take note of is the mounting system of the Xrox bar?
Now Im not getting into a like it or not topic here, the bars design is irrelevant in my arguement.
The xrox bar mounts to the sides of the chassis railand the mounts themselves do not potrude past the end of the chassis rail....being lighter than an ARB or Ironman bar would help, but its the mount design that I think would be of most benefit here.
Even if they kept the same style of ARB/Ironman bar but changed the mounting system, they would be able to pull the bars closer inwards and reduce the amount of stress the chassis takes.
heres a pic below of the mount -