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K4 Sup Race 21cm US Fin

Our swept back SUP race fin.


45 degree rake so you don’t have to worry about weed or debris.

Foil optimised for paddling speeds, but taking many pointers from our speed windsurfing fins. In fact I stuck this yellow fin in my windsurf and did 48mph on it!
Dynamic Flex material gives more grip, better tracking and more speed than stiffer materials. (Fins with flex are always faster than stiff fins when the loads and AOA are low)


21cm – 210 area – 215g

K4 Sup Race 21cm US Fin