Fast, Smooth, and Alive Under Your Feet.
Overview
In 1976, Jack was shaping boards out of Shane’s factory in Brookvale when Jim Pollard walked in with something new — a full-length, curved channel bottom that followed the rail line from nose to tail. These “Fluid Foils” changed the way boards moved through water, and from 1976 to 1981 Jack was shaping 10–15 of them a week.
The current JPI Single Fin is inspired by those original shapes, but updated with a few modern tweaks. The channels start about 12 inches down from the nose and run soft and curved along the rail line, exiting through subtle flyers in the tail. They compress water under the front foot and release it out the back, creating more lift, speed, and liveliness than a standard flat-bottom single fin.
Jack shapes these in a variety of styles — some with tighter, more performance outlines, and others with a cruisier, fuller shape. But the through-line is the same: effortless trim, beautiful hold, and the added spark that comes from water moving through those channels.
Design Features
Tail: Pin — clean and drawn for hold and trim
Rails: Medium — balanced for control and release
Bottom Contour: Full-length, curved rail channels starting 12" from the nose
Rocker: Medium — all-rounder curve
Fin Setup: Single fin (Finbox)
Glassing: 6oz bottom, 6oz + 4oz deck
Ideal Conditions
Available Sizes
All volumes approximate due to hand-shaped construction
6’0” x 20” x 2 1/2” — approx. 33.3L
6’2” x 20 1/8” x 2 1/2” — approx. 34.3L
6’4” x 20 3/8” x 2 1/2” — approx. 35.5L
6’6” x 20 5/8” x 2 5/8” — approx. 39.2L
6’8” x 20 7/8” x 2 5/8” — approx. 41.0L
6’10” x 21 1/8” x 2 3/4” — approx. 44.9L
7’0” x 21 1/4” x 2 7/8” — approx. 47.7L
Pricing
Fast, Smooth, and Alive Under Your Feet.
Overview
In 1976, Jack was shaping boards out of Shane’s factory in Brookvale when Jim Pollard walked in with something new — a full-length, curved channel bottom that followed the rail line from nose to tail. These “Fluid Foils” changed the way boards moved through water, and from 1976 to 1981 Jack was shaping 10–15 of them a week.
The current JPI Single Fin is inspired by those original shapes, but updated with a few modern tweaks. The channels start about 12 inches down from the nose and run soft and curved along the rail line, exiting through subtle flyers in the tail. They compress water under the front foot and release it out the back, creating more lift, speed, and liveliness than a standard flat-bottom single fin.
Jack shapes these in a variety of styles — some with tighter, more performance outlines, and others with a cruisier, fuller shape. But the through-line is the same: effortless trim, beautiful hold, and the added spark that comes from water moving through those channels.
Design Features
Tail: Pin — clean and drawn for hold and trim
Rails: Medium — balanced for control and release
Bottom Contour: Full-length, curved rail channels starting 12" from the nose
Rocker: Medium — all-rounder curve
Fin Setup: Single fin (Finbox)
Glassing: 6oz bottom, 6oz + 4oz deck
Ideal Conditions
Available Sizes
All volumes approximate due to hand-shaped construction
6’0” x 20” x 2 1/2” — approx. 33.3L
6’2” x 20 1/8” x 2 1/2” — approx. 34.3L
6’4” x 20 3/8” x 2 1/2” — approx. 35.5L
6’6” x 20 5/8” x 2 5/8” — approx. 39.2L
6’8” x 20 7/8” x 2 5/8” — approx. 41.0L
6’10” x 21 1/8” x 2 3/4” — approx. 44.9L
7’0” x 21 1/4” x 2 7/8” — approx. 47.7L
Pricing
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