FCS
The back end of a quad conversion for your mid-length. Harley designed these as the trailer pair to his Mid Set thruster — drop them in alongside the front Mid Set and you've got a full four-fin setup ready to go. Same board, completely different feel: more drive through flat sections, more hold off the bottom, smoother arcs through long turns.
These aren't standalone — they're meant to work with a matched front set. If you're not running the HI Mid Set up front already, grab both and you've got the most versatile mid-length fin setup in the shop. Thruster one session, quad the next.
Performance Core construction keeps the trailers light and responsive — stiff enough to drive but with the tip flex to stay lively on a longer rail. Tuned for the kind of progressive, modern mid-length surfing Harley built his name on.
Quad rear trailers
Performance Core construction
Large
Designed for mid-lengths, hybrids, and longer performance shapes
Best on: mid-lengths and hybrids with moderate-to-extreme rocker and deep concaves.
