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Finology

Every Futures fin, explained

Construction changes how a fin feels. Shape changes how a board turns. Pick both and you've picked your next fin — no guesswork, no clicking through ten product pages to find out.

The Ride Number

Futures rates every construction on a 1–10 scale, from fins that hold a predictable line to fins that generate speed and snap out of turns. Every card below shows where it sits.

12345678910
1 – 4

Speed Control

Solid, engaged, predictable. Built for powerful conditions.

4 – 7

Balanced

All-around. Drive, hold and looseness in equal measure.

7 – 10

Speed Generating

Springy, fluid, responsive. Built to create speed from nothing.

Feel = Flex + Rake + Foil

How the Ride Number is calculated

Three physical properties of a fin combine to produce its Ride Number — and they're not weighted equally.

Heaviest factor

Flex

How much the fin bends under load. A softer, springier flex generates speed through a turn. A stiffer, more stable flex holds its line and controls speed instead. Flex carries the most weight in the Ride Number of any single factor.

Soft → Generating Stable → Control
Significant factor

Rake

The sweep of the fin, upright or laid-back. An upright rake feels pivoty and turns tight — a speed-generating trait. A laid-back rake feels stable and holds through long carves — a speed-control trait.

Upright → Generating Laid-back → Control
Lightest factor

Foil

The fin's cross-section. A flat foil feels engaged and predictable through a turn — speed control. A V or V2 foil feels fluid and responsive — speed generating. The subtlest of the three, but still noticeable on the water.

V / V2 → Generating Flat → Control
01 — 1 to 4

Control Series

Traditional fiberglass

Solid fiberglass panels, CNC-cut and hand-finished. The toughest, most predictable option in the range and the easiest to sand back after a reef strike — built for surfers who want their fins to hold a line in powerful, heavy conditions.

Shop Control Series
02 — 3 to 4.5

Techflex

Light like Honeycomb. Stiff like fiberglass.

A honeycomb core reinforced with 3K carbon along the base and tip. Stiff enough to stay engaged on big drops, light enough to stay responsive off the rail — the pick for powerful surfers who don't want to give up spring.

Shop Techflex
03 — 4 to 7

Honeycomb

All-around performance

A lightweight hexagonal core drops weight without giving up stiffness where it counts. The standard upgrade fin — medium flex that drives down the line, holds through turns and boosts airs in almost any condition. Legacy Series is built on this construction.

Shop Honeycomb
04 — Balanced

Alpha NetPlus

Made from recycled fishing nets

A collaboration with Bureo — recycled fishing nets combined with carbon-and-air-infused Compound 6. A flat foil for a reliable, familiar feel in all conditions, with a lighter environmental footprint than a standard injection-moulded fin.

Shop Alpha
05 — 7 to 10

Blackstix 4.0

Faster. Lighter. More responsive.

A precision carbon and fiberglass matrix with a V2 foil and lightweight epoxy resin. The V2 foil is concave at the base and flattens toward the tip, keeping speed through rail-to-rail transitions — Futures' liveliest, most responsive construction.

Shop Blackstix
06 — Top tier

Vapor Core

Handmade. Hollow. Weightless.

Instead of a foam core, Vapor Core removes the core entirely — a woven carbon exoskeleton pre-loaded under tension, handmade start to finish in California. Roughly 25% lighter than a moulded fin, for surfers who feel every gram.

Shop Vapor Core

Legacy Series

Legacy Series isn't a different material — it's Honeycomb construction, offered in three fin shapes so you can feel the difference shape alone makes. Every size in a template category shares the same surface area, so you get the true feel of that shape, not just a bigger or smaller fin.

Available in XSmall, Small, Medium and Large across all three templates.

Rake

Drawn-out · Drive

XS · S · M · L

Neutral

All-around · Fluid

XS · S · M · L

Pivot

Tight turns · Loose

XS · S · M · L

Shop by series & shape

Legacy Series Legacy Series Shaper Collection Shaper Collection Twin Fins Twin Fins Quad Fins Quad Fins

Fin sizing

Sized to rider weight, not board length. Start here, then fine-tune with construction once you know your size.

Small

45 – 60kg

Medium

55 – 80kg

Large

75kg+

19 of 51 products

               

Futures Surfboard Fins

Futures Fins has been shaping the way surfers connect with their boards since 1996. Built around a full-base fin system that locks the entire fin into the box, Futures delivers a solid, direct feel that translates every movement into drive and response. It's the reason some of the world's best surfers have trusted Futures for decades.

The Futures system is engineered for performance. Because the full base of the fin sits inside the box rather than relying on tabs or clips, the connection between surfer, board, and wave is as direct as it gets. The result is more power through turns, more hold in critical sections, and a locked-in feel that gives you confidence to push harder.

Futures fins are available in a wide range of templates, flex patterns, and materials to suit every style of surfing. Whether you're riding a high-performance shortboard in punchy beach break, a step-up in overhead surf, or a twin or quad setup for something looser and faster, there's a Futures fin built for it. Materials range from fibreglass and honeycomb composites through to full carbon construction, each offering a different balance of stiffness, flex, and weight.

Sizing is straightforward — most Futures fins are categorised by surfer weight, so finding the right fit is a matter of matching your build to the template. From there, it's about dialling in the setup that suits your board and the conditions you surf most.

Shop the full Futures Fins range at Welcome Boardstore — Australia's home for premium surf gear.

Got Questions? we have answers!

FAQ's

Are surfboard fins universal?

Surfboard fins are not entirely universal, but there are some common standards. The main factors that determine fin compatibility are the fin box type and size, as well as the fin system used. The most common fin systems are:

1. Future Fins: are arguably the best fin system to date. This is because the entire base of the fin sits inside the fin box, creating a solid connection between the surfer and the board. The solid base provides maximum drive and responsiveness, allowing for better performance and control. Future fins are known for offering a strong, locked-in feel, which many surfers appreciate for both power and precision.which uses a different type of base and installation mechanism. Future fins usually require a tool to install them, unlike the tool-less FCS II.

2. FCS (Fin Control System): This is one of the most widely used systems. FCS fins come in two main types: FCS I (old version) and FCS II (tool-less, newer version). The FCS II system has a quick-release mechanism, so you can pop the fins in and out without needing a tool.

3. US Box: This is a more traditional fin box that’s often used on single-fin setups but can also be used with thrusters. It requires screws to secure the fins, and the fin itself has a tab that fits into the box.

4. Glass-on fins: These are fins that are permanently attached to the surfboard during the manufacturing process. They don’t use a removable system, so they’re not interchangeable unless the board is modified.

What size surfboard fins should I use?

The size of surfboard fins you should use depends on several factors, including your weight, surfboard type, wave conditions, and surfing style. Here’s a general guideline to help you choose the right fin size:

1. Fin Size Based on Surfer’s Weight

Most fin brands categorize their fins by weight range:

• XS (Extra Small): Under 120 lbs (55 kg)
• S (Small): 120 - 155 lbs (55 - 70 kg)
• M (Medium): 140 - 180 lbs (65 - 80 kg)
• L (Large): 175 - 210 lbs (80 - 95 kg)
• XL (Extra Large): Over 210 lbs (95 kg)

2. Fin Size Based on Board Type & Wave Conditions

• Shortboards – Ride the fin size that best suits your weight (refer to the weight chart). This ensures optimal performance, maneuverability, and control.

• Step-Up Boards – Designed for bigger waves, step-ups require a slightly different fin approach. Boards shorter than 6'2 in length we recommend riding the size finds that work for your wait. However, for boards longer than 6'2", you should consider drop down in fin size because the board’s longer rail line naturally generates more hold. This allows you to ride smaller fins while maintaining stability and control.

By adjusting your fin size based on board length and wave conditions, you can fine-tune your setup for maximum performance in any surf.

3. Fin Size Based on Surfing Style

• More vertical, high-performance surfing: Medium to large fins with a balanced template.

• Speed & down-the-line surfing (point breaks, barrels): Larger fins for control and drive.

• Loose & playful surfing (airs, quick turns): Smaller fins or a twin-fin setup for more release.

4. Fin Setup Considerations

• Thruster (3 fins): Most common setup, providing a balance of speed, control, and maneuverability.

• Quad (4 fins): More speed and hold, great for bigger or hollow waves.

• Twin Fin (2 fins): Loose and fast, ideal for retro boards and fun waves.

• Single Fin: Classic feel, more drawn-out turns, often used on longboards and mid-lengths.

If you’re unsure, a medium-sized fin (if you’re in the weight range of 65 - 80 kg) is a safe starting point. You can always experiment with different sizes and setups to find what works best for your board style and the conditions you surf in!

Why are surfboard fins so expensive?

Surfboard fins can be expensive due to several key factors:

1. High-Quality Materials

Most premium fins are made from fiberglass, carbon fiber, or composite materials. These materials are lightweight, durable, and provide optimal flex and performance. Some cheaper fins are made from plastic, but they lack the same level of responsiveness and strength.

2. Advanced Manufacturing Processes

High-end fins undergo complex manufacturing processes such as resin transfer molding (RTM), honeycomb construction, and carbon layups, which enhance durability, flex, and performance. These processes require precision and expertise, adding to production costs.

3. Performance Engineering & Research

Leading fin companies like Futures and FCS invest heavily in hydrodynamic research and development. They test different templates, flex patterns, and foils to maximize speed, control, and maneuverability, which drives up costs.

4. Durability & Longevity

Well-made fins last a long time, even under heavy use. While cheaper plastic fins might wear out or break, premium fins maintain their performance and structural integrity, making them a long-term investment.

5. Branding & Professional Endorsements

Many high-end fins are designed in collaboration with pro surfers and shapers, adding exclusivity and credibility to the product. Limited edition or signature fins often come at a premium price.

6. Fin System Compatibility & Innovation

Fins are designed to fit specific fin systems (Futures, FCS, etc.), and companies continue to innovate to make them lighter, stronger, and more functional (like FCS II’s tool-less system), which adds to costs. While expensive, quality fins can significantly enhance your surfing experience, offering better drive, hold, and responsiveness compared to cheaper alternatives.

If you’re serious about performance, investing in a good set of fins can be well worth it!

What do surfboard fins do?

Surfboard fins play a crucial role in a board’s performance by providing stability, control, drive, and maneuverability. Here’s how they impact your surfing:

1. Stability & Control

Fins help keep the board stable and balanced by preventing it from sliding out when turning or riding down the face of a wave. Without fins, the board would feel extremely loose and difficult to control.

2. Drive & Speed

Fins channel water flow beneath the board, creating forward momentum (drive) and helping you maintain speed through turns and down the line. Larger and stiffer fins typically generate more drive.

3. Maneuverability & Turning Ability

The fin setup affects how easily you can turn. Smaller fins allow for quicker, looser turns, while larger fins provide more control and drawn-out arcs. The placement and number of fins also influence maneuverability.

4. Hold & Traction

Fins create grip on the wave, preventing the board from sliding out, especially in critical sections. More hold is ideal for bigger, steeper waves, while looser setups are better for playful, small waves.

5. Customization & Performance Tuning

Different fin setups allow surfers to tweak their board’s performance:

• Thruster (3 fins): Balanced control and maneuverability, the most common setup.

• Quad (4 fins): More speed and hold, great for bigger waves.

• Twin Fin (2 fins): Loose and fast, fun for small waves.

• Single Fin: Classic feel, smooth turns, and drawn-out lines.

Fins are essential to how a surfboard performs, and choosing the right setup can make a huge difference in your surfing experience.