As far as I can tell if you have a 5 point (or 6 point) roll bar then the main hoop needs to be 1 3/4. That is good to 10.00.

The 8 point cage can be 1 5/8 mtl and is required if you get into the 9's.

The main hoop on this cage is 1 5/8 so I think I'm just going to cut the whole thing out and start over.

Any recommendations for a roll bar kit? I see that Jeg's has them, Art Morrison, Comp Engineering, etc. From what I can tell all of the kits are really crude with no fishmouthing on the tubes or anything like that. It is basically just a bunch of straight tubes in a box plus the main hoop. The rest is DIY.