Stock Polaris RZR - Roll cage is pretty ugly and could use a bit more strength
What to look for:
Material selection - Chromoly, mild steel or aluminum
and thickness. Each material & thickness has pros and cons - cost,
strength, weight, etc. Make sure you ask questions.
Cage Design - Gussets and triangulation increase the
strength without adding much more weight.
Removeable? - Most aftermarket cages are bolt-on. Besides mounting to stock lower bars, does the cage
add any mounting locations? A custom made cage that is bolted or welded to
the frame is stronger than one that bolts to the factory cage location, but
cost will increase and you won't be able to get the cage off as easily or at
all.
Restraint Mounts - Make sure the cage includes a bar
behind the front seats for attaching shoulder harnesses. Shoulder harnesses
should be attached slightly below your shoulder level. If the cage does not
allow for this, find another cage. Restraints should be as short as
possible, and mounting them down on the floor seriously affects their
effectiveness.
Head Clearance - Make sure that all parts of the cage
are sufficiently away from all passenger heads.
Manufacturers of Roll Cages, Side Panels, Doors & Bolt on Leg Minders