Build Your Own Grennan (FCS Base) - Apex Center:Large 12 in²Rake: 37

12 in²Rake: 37

and transition seamlessly between turns

and smaller 2 plus 1 fun-boards

The smooth rotating

Saxon Boucher

Build Your Own Grennan (FCS Base) - Apex Center:Large 12 in²Rake: 37Build your own Thruster Quad 5 Fin Grennan fins. Jeff Grennan has been working on the design of his templates for years. Over the last year we've been working with him to add a high performance foil in order to increase the flow and speed of his fins. Jeff's idea was to pair a narrow base in order to decrease drag while adding lots or rake in order to retain control down the line and through turns. And boy was he right; his template has become a