K4 Fins available from Chinook

[rtz]

Just noticed on their page:

https://chinooksailing.com/collections/k4-fins

[jmcilhiney]

Do the plastic fins work well?

[grantmac017]

[U2U2U2]

[PeconicPuffin]

[U2U2U2]

K4, have and continue development. Material is offered on some fins in 2 different stiffness. The longer fins for Freemove,Freeride and the race profile are all stiffest. The selection on multi fins is mind boggling . A published test for speed has no equal, in defining , it includes a G10, major league player.
The size on most goes very small for sides or forwards on a quad, if so desired makes experiments into the realm of affordability. They make the Graham Ezzy series in asymmetrical foil inside , with a 1 2 or 3 degree of built toe in, not everyone cuppa, but worth a try on forward or side fins. Pro con of this multi page.
I find that power, drive or looseness can be enhanced by the option of fins.
I have most of the fins made, they are normally my go too on my quad.
Steve the owner, tester, designer will answer your questions on particular setups.
The composition , is high tech plastic, calling them plastic is like calling a Corvette a Chevy . The longer fins will have more flex than G10, smaller multi have similar characteristics to G10.
The selection offered in the OP link is the tip of the iceberg.

[U2U2U2]

In the van or were there , the brands from board companies excluded.
True Ames BPF MUF MFC FCS Makani CNC CHOCO LASSETER SELECT TARIFA FIN CO Fin Works. Prob missed some.

K4.

[swchandler]

What, no Tectonics?

Did I ever show you those Lessacher carbon asymmetric fins that I have?

[U2U2U2]

I had a tectonics in 1999 with my Mikes Lab.

I don’t remember about the carbon asy, maybe too much beer

[spennie]

Too much beer???!!