Sabfoil Flat 425 Rear Stabilizer Pro Finish | Hydrofoil Stabilizer

The Sabfoil Flat 425 Rear Stabiliser is the largest stabiliser in Sabfoil's flat range, pairing the loose, winglet-free flat profile with extra surface for added lift and stability. Part of the Sabfoil hydrofoil system, it's the pick for bigger front wings, lighter-wind sessions, heavier riders and anyone learning, where a planted, forgiving tail makes the foil easier to control.

With 266cm² and a 6.80 aspect ratio, the Flat 425 delivers low-speed stability and early lift while keeping the flat-profile manoeuvrability that makes turning intuitive — a versatile all-rounder for wing, kite and surf foiling.

Who It's For

• Discipline: Wing foiling, kite foiling and surf foiling on bigger front wings or in lighter wind
• Level: Beginners through to advanced foilers who want extra stability and lift
• Best for: Heavier riders, learners, and anyone pairing it with a larger front wing for easier control

Key Features

• 266cm² surface area – largest in the flat range, adding real lift and stability for bigger wings or lighter wind
• 6.80 aspect ratio – tuned for low-speed stability and early lift over outright top-end speed
• Winglet-free flat profile – keeps turning loose and intuitive despite the added surface area
• Full carbon with core construction – around 129g, durable and consistent under load
• SAB Pro Finish – hand-sanded matte surface with 0-thickness graphics, Made in Italy

Real-World Feel

The Flat 425 is forgiving and confidence-inspiring underfoot — it lifts early, holds a stable platform at low speed, and doesn't punish small mistakes the way a smaller, twitchier stabiliser might. For heavier riders or lighter-wind days when a wing struggles to generate lift on its own, the extra surface area here does a lot of the work. It still turns loose and intuitively thanks to the flat profile, so you're not trading away manoeuvrability for that stability.

Setup / Fit

The Flat 425 mounts to your fuselage using Sabfoil's modular hardware — pair it with a Sabfoil front wing and fuselage to complete your hydrofoil. Not sure which stabiliser suits your wing? Speak to the team at Northern Watersports and we'll help you match it.

Materials

• Construction: full carbon fibre with internal core
• Weight: approximately 129g
• Wingspan: 425mm, root chord 78mm, max thickness 9.5mm
• Volume: 145cm³
• Finish: SAB Pro Finish, hand-sanded matte surface

Pairs Well With

The Flat 425 works well with larger Sabfoil front wings for lighter-wind or learner setups — check out our foil masts and fuselage options if you're building a full setup from scratch.

Why We Stock It

Not every rider or every session calls for a small, twitchy stabiliser. We stock the Flat 425 because bigger, forgiving stabilisers genuinely make foiling more accessible for heavier riders, beginners and light-wind days, and it's a straightforward recommendation whenever extra lift and stability are what's needed.

FAQs

What is the Sabfoil Flat 425 Rear Stabiliser?

It's the largest stabiliser in Sabfoil's flat range, a 266cm² full-carbon-with-core stabiliser designed to add lift and stability for bigger front wings, heavier riders and lighter-wind sessions.

Who is the Flat 425 best suited to?

It suits beginners, heavier riders, and anyone foiling in lighter wind or pairing it with a larger front wing, where extra stability and early lift make the foil easier to control.

Does the Flat 425 still turn well despite its size?

Yes, its winglet-free flat profile keeps turning loose and intuitive even with the added surface area, so you get stability without losing manoeuvrability.

Is the Flat 425 compatible with my Sabfoil fuselage?

Yes, it mounts using Sabfoil's modular fuselage system. Check whether your setup is T6 or T8 spec, as the mounting screws differ between the two.

How much does the Flat 425 weigh?

Approximately 129g, reflecting its full carbon construction with an internal core for durability.