A place for more technical discussions. Please make sure you post in the correct section on the site, this way it keeps the site tidy AND ensures you get a more relevant answer.
Yes, any full cage would need triangulation inside the car otherise it just collapses like any open ended carton would if pushed on the side.
Mine has a diagonal inside the car which bolts through the roof onto the external cage. However if I remember correctly it does not bolt through to the chassis below but goes to some spreader plates on the floor (it was fitted when I bought it). If it went to the chassis it would create an interesting problem where the car body becomes rigidly attached to the chassis rather than "floating" on the body rubbers. As it is my body is effectively attached through to the chassis by the roof bolts to the cage! There is still some movement between the body and the cage as the previous owner fitted small rubbers (door stops!) between the cage and the body and I can hear it move sometimes!
Martin
Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
