4.5" Stompfin™

The shorter StompBox fin for shallow rivers, rock gardens, and technical runs. Compatible with every Hala StompBox system -- StompBox 1.0, 2.0, and 2.5. When the 9" Spring StompFin would drag or hang up in low water, swap in the 4.5" and run it without worrying about your fin.

Like all StompBox fins, the spring holds the 4.5" StompFin locked at full depth at all times -- not gravity, not water flow. Hit a rock and it deflects cleanly, springing back to full deployment before your next stroke. This fin shape even retracts from a backward graze when you drift into a rock moving downstream. Zero wobble, zero bounce, locked-in performance wherever the river takes you.

Current StompBox 2.5 boards (Atcha 96, Atcha 86, Rado, Radito) ship with the 9" Spring StompFin as the standard center fin. The 4.5" StompFin is the ideal optional upgrade for low-water runs and rocky lines where a shorter fin is the right call. It's also a direct replacement if you've lost or worn out your original. See the full Hala fin lineup, including the 9" Tracking StompFin for deeper water and stronger long-run tracking.