Sigma Motorsports

A clean slate to work with. This fiberglass tub CJ5 is a bare bones rig ready for some Sigma tubework. It will get a full 6 point cage, tied to the frame via rocksliders underneath, and Mastercraft seat mounts tied to the cage. Should be a good build, stay tuned.


	A fresh clean glass tub is a thing of beauty. No rust, no rash, no dents or bumps. Just clean and smooth, ready to be worked on. But, working a glass tub isn't the same as a steel one. There are other issues to deal with; the tubs are never anywhere near square or even, compressing the tub between plates is touchy with the non-flat glass surfaces, etc. It opens a whole new can of worms.


	One of the major issues in building this cage is the non-squareness of the b-pillar foot area. It sits at an angle as well as being undercut towards the rear. This makes for some time consuming foot fabrication in these areas as well as the a-pillar area.


	The b-pillar mounts were constructed from 4 separate plates to meet the odd angles of the glass tub. The a-pillars required 3 plates. We got off easy with the c-pillar area. It was the only flat spot on the tub. With the feet mounting areas made, we can move on to the tube work.


	With the feet mounting areas made, we can move on to the tube work. Main bars in, and filler on it's way. The customer wanted a little more headroom in the rear in case there was an adult rear passenger.


	Spanners front and rear with kicks-outs to match, visor bar with kick to the front to meet the windshield frame. All came together nicely. Shoulder bar with braces added for 4-point belt mounts.


	Sliders and frame tie-ins were made to carry this new cage. It's never good to rely on the tub to carry the force that it might take in a roll or flop. A cage tied to the frame can be a lifesaver, and make you more confident on the trail.


	Cage pulled from the rig to to fully welded. Handles added for ease of entry. A better shot of the seat mounts to carry the Mastercraft seats. Mounting your cage to the frame does you no good of the tub still carries the seats.


	Some shots of the completed project. Turned out very nice. Looks really good with the seat in. The customer has a lot of work to do before this things hits the road, but he has promised to send us a pic to update us. Click HERE for the full gallery of photos.