Quote Originally Posted by markw View Post
I believe any additional tubes added are required to be the same diameter as the roll cage in IT. The view can be very obstructed. Here is my view and my windshield braces are smaller than the 1.5 roll cage tube.
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The 2010 GCR states:

9.4.F.3 The required tubing elements must meet the material minimums set forth above. Optional tubing elements may be any size.