FCS II HI Tri Fin Longboard Surfboard Fin Set
All weights – Cool Grey PC02 with Aircore construction
The FCS II HI is new updated version of Harley Ingelby’s HI1 fin set, one of the first 3 fin 2+1 set-ups on the market designed specifically for performance longboards and surf SUPs. US Longboard base centre fin (tool-less FCS II) and FCS II fitting side fins, PC Performance Core construction..
The large fins feature a long base, tapered narrow tip, and moderate sweep angle. Ideal for modern longboards, surf SUPs and other high volume hybrid and fish board designs.
Specs:
Centre Fin:
Base: 4.84″ / 123mm
Depth: 5.27″ / 134mm
Area: 18.5″sq / 11937mm2
Sweep: 32.1 degrees
Side Fins:
Base: 4.61″ / 117mm.
Depth: 4.99″ / 127mm.
Area: 16.93″sq / 10923mm2.
Sweep: 34 degrees
Foil: Flat.
Note: You may find some 2+1 thruster fins identified on catalogues/stock numbers as ‘Large’ or ‘XL’, but this is just used as a comparison to shortboard fins and is NOT a weight guide for users.









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