Talking Longboard Fins with Brad Rochfort

When it comes to longboard fins, Brad Rochfort knows his stuff. A respected local board shaper based in Newquay, Brad has spent years crafting custom boards for surfers of all styles and abilities. He also works as a representative for FCS fins - one of the most trusted names in surf hardware. Whether he’s shaping boards in the bay or helping surfers fine-tune their setup, Brad brings a clear, practical understanding of how different fins affect performance.

We caught up with him to break down some of the basics and clear up a few common questions about longboard fins - perfect for anyone feeling a bit lost with all the different shapes, sizes, and names out there.

1. For someone buying their first longboard fin, what's the most important thing to look for?

Brad: Fins play a very important role in the board’s overall performance and feel. Do some research first, or ask for advice from your local surf shop. Most important is getting the correct size fin and template for your specific board.

2. Can you briefly explain what a longboard fin does and why it's so important to performance?

Brad: A longboard fin combined with the right board should give down-the-line speed and stability, while responding seamlessly to the surfer’s movements and changes in direction.

3. There are so many shapes and sizes - can you break down the main types of longboard fins (like pivot, rake, flex) and what kind of surfing each is best for?

Brad: Fins with more rake, especially in fibreglass construction, are designed with flex in mind. This flex creates a spring effect through turns, which helps with drive and acceleration. The extra rake also gives more hold in the tail, adding stability when nose riding. Fins that stand more upright will have more pivot, allowing the board to turn in a tighter arc — ideal for boards with flatter rocker.

4. How does the length of a fin (like 8", 9", 10") impact the way a board rides?

Brad: Longer fins are generally used in single-fin boards and suit traditional nose-riding styles. Smaller centre fins are mostly used in 2 + 1 setups (with side bytes), which are common in performance longboards and mid-lengths.

5. Can you explain the role of flex in a fin and how it affects turning or speed?

Brad: The flex in a fin can create a spring effect when a board is pumped or turned. As the fin bends under pressure, it stores energy - then releases it like a spring when you exit the turn. Fibreglass fins are far more efficient at storing and releasing this energy compared to moulded or plastic fins.

6. How should someone choose a fin based on their surfing style - say, traditional nose-riding vs more progressive turns?

Brad: See my answer to question 4 - it really comes down to whether you’re leaning toward a classic single-fin feel or a more responsive, performance-driven 2 + 1 setup.

7. Do certain fins work better in certain wave conditions? If so, how should surfers adjust?

Brad: Generally yes. In Hawaii, where waves are steeper and more powerful, longboarders tend to favour the 2 + 1 fin setup with boards that have a harder edge in the tail. In California, where the waves are smaller and softer, single fins and boards with rolled, softer tails are more popular for traditional-style surfing.

8. What are the pros and cons of different fin materials, like fibreglass vs composite?

Brad: As I mentioned earlier, fibreglass fins are more efficient at storing and releasing energy, giving better drive and feel through turns. Plastic or moulded fins tend to be less responsive and don’t offer the same level of performance.

9. What makes FCS longboard fins unique compared to others on the market?

Brad: FCS longboard fins feature a unique screw-less click-in system, which eliminates the need for a screwdriver. This makes it easier to attach or adjust your fin - even without leaving the water. FCS also offers traditional screw and plate options for those who prefer a more classic setup.

10. Are there any new fin technologies or designs FCS is excited about for longboarders?

Brad: Three years ago, Ben Skinner became the first British surfer/shaper to get a signature fin with FCS. His fin is also the only FCS longboard fin in the world built with AirCore technology. We’re currently working on an update - with a new size and colour combo coming out in the next few months.

11. What common mistakes do you see beginners make when choosing a longboard fin?

Brad: Choosing a fin just for its colour, or buying a plastic fin expecting it to perform like a premium fibreglass one. It’s worth investing in something that suits your board and style.

12. If you could give just one piece of advice to someone looking to improve their longboarding through fin choice, what would it be?

Brad: The fin you choose can account for around 30% of a board’s overall performance - but a quality fibreglass fin only costs about 10% of what you’d pay for a longboard. It’s great value for money. Don’t be afraid to experiment to find the magic combo!

Big thanks to Brad for sharing his insights and helping to take some of the mystery out of longboard fins. Hopefully, this chat has made things a little clearer and given you the confidence to explore what works best for your setup. If you’re still not sure which fin to choose, pop into the shop - we’re always happy to help match you with the right gear. See you in the water!