The FCS II Mayhem Driver Quad Rear Fin Set is Matt Biolos' Carver-family quad rear template. It has a wide base, curved trailing edge and tapered tip for strong hold and control through powerful, drawn-out turns, and suits everything from performance quads to everyday boards like the RNF and Puddle Jumper.
| Fin system | FCS II |
| Setup | Quad rears (2 fins) |
| Construction | PC Carbon + AirCore |
| Sizes | Medium, Large |
| Colors | White, Blue |
As a general guide by surfer weight: Medium about 145–175 lb; Large about 165–200 lb. If you're between sizes, size up for more hold or down for a looser feel.
Will these fit my board? They fit boards with FCS II fin boxes. They won't fit original FCS two-tab plugs or Futures boxes.
Does this include front fins? No, this is a pair of rear fins. Use it with matching side fins from a tri set or a quad front pair.
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