Finology
Everything about this fin, explainedOverview About this fin What it is, who it suits, and it on film
The John John (L) Techflex fin is a large sized thruster in the Neutral template category. This template is a scaled-up version of the Medium template that John John Florence rode exclusively to back-to-back World Championships. John rides this template in his small wave boards that feature a wider tail and require more lift from his fins. The Techflex construction and flat foil give this fin a stable feel, making it ideal for controlling speed in more powerful waves.
- Template Category | Neutral (balanced/fluid)
- Construction | Techflex
- Ride Number | Speed Control – 3.4
- Size | Large (75kgs+)
Construction TechflexLight like Honeycomb. Stiff like fiberglass.
Engineered stiff and light. Solid and engaged on big drops, then light and responsive the moment you engage the rail. Sits just above the fiberglass line — built for powerful surfers and powerful waves.
Ride Number 3.4 · Speed control
Techflex spans 3–4.5; this fin sits at 3.4.
Stiff and light
Speed control + responseFor surfers who want big-wave hold with a bit more spring off the lip. The honeycomb core keeps the weight down, the carbon keeps it stiff and engaged. Solid rail turns and drive down the line, springy when you ask for it.
3K carbon
Controlled flex3K carbon runs along the base and the tip, making the fin as light as Honeycomb while holding the stiffness of fiberglass. The result is a vertical flex pattern — control and drive down the line, lively and free off the lip.
Signature Techflex
Ridden by John JohnJohn John Florence designed his Techflex signature as a larger complement to the F4 template. Medium base carrying through to a medium tip, and his weapon of choice in just about any condition.
Template Neutral The middle ground
Enough rake to hold, enough upright to turn tight. Neutral is the all-rounder of the three templates and where most surfers land — it does not force you into a style, it just does what you ask.
Specifications This fin's numbers Area, height, base, angle and foil
Ride Number 3.4 · Speed control How Futures rates every fin
Feel = Flex + Rake + Foil
Futures rates every construction on a 1–10 scale. Low numbers hold a predictable line and control your speed. High numbers generate speed and snap out of turns. Three physical properties combine to produce it, and they are not weighted equally — flex counts for the most, then rake, then foil.
Solid, engaged, predictable. Built for powerful conditions.
All-around. Drive, hold and looseness in equal measure.
Springy, fluid, responsive. Built to create speed from nothing.
Flex is how much the fin bends under load — soft generates speed, stable controls it. Rake is the sweep of the outline — upright turns tight, laid-back holds long. Foil is the cross-section — a V or V2 foil feels fluid, a flat foil feels engaged.
Sizing Which size am I? Sized to rider weight, not board length
Futures sizes fins to the surfer, not the board. Find your weight, then fine-tune with construction and template once you know your size.
XSmall / Grom
35 – 50kg
Small
45 – 60kg
Medium
55 – 80kg
Large
75kg+
The bands overlap on purpose. If you sit on a boundary, size up for more hold and drive, or down for a looser, easier-to-turn feel.
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