It depends on the application. They are o.k. for a dd. Secondly, it beats no "sport bar". Finally, they can be tied into the frame.mg74se said:bolt in rollbars are about as effective as an accordian during deer hunting season.
if your gonna do it, do it right and weld it in.
weight of vehicle and the force put on the cage during an impact are two different things, but I agree a bolt in cage can be done well. it is better than nothing, and in most rock crawling, trail riding, and mudding applications, the severity of the rollovers do not warrant a cage needed by say, a prerunner. also using a sandwich system to connect the plates on the cage, to plates under the floor that connect to the frame is easily done and adds alot of strength.Paul91 said:If you do the math and have large enough mounting plates you can account for huge amounts of weight per square inch. I had some concerns about my "roll bar" so I had my mechanicel engineer friend crunch some numbers on what I had in place. Turns out I can just about set 2 broncos on the bar and still have the weight supported.