AFS HM Carbon Mast

The AFS HM Carbon Mast is the step up that serious foil riders reach for once they've outgrown the HR range. Built from High Modulus carbon — a grade roughly 1.5 times stiffer than standard carbon — it delivers sharper response, cleaner energy transfer during pumping, and notably better glide than its HR counterpart. This is the mast for intermediate to advanced riders who want their inputs to count.

Available in 80cm and 85cm, the HM fits most AFS foils disciplines where speed, precision, and control take priority over forgiveness. Whether you're pushing hard downwind laps, charging into waves, or unlocking higher average speeds on a wing, the HM's stiffer profile gets out of the way and lets the foil do the work.

Who It's For

The HM Carbon Mast is aimed squarely at intermediate to advanced riders who have consistent foil control and want a more direct, responsive ride without committing to the all-out stiffness of the UHM. Wing foilers who regularly push above 25 knots, kite foilers looking for crisper tacks and gybes, and surf foilers riding faster point breaks will all feel the difference the HM makes over the HR. It's also the mast of choice for riders who pump a lot — the stiffer frame loses less energy to flex and rewards efficient pumping technique with better glide time between strokes.

Key Features

• HM (High Modulus) carbon construction — approximately 1.5× stiffer than standard carbon
• Thinner profile than the HR mast, reducing drag and improving glide at speed
• Stiffer flex profile for more direct, immediate response to rider inputs
• Available in 80cm and 85cm — covers all-round and bigger-swell applications
• Full Fuselink compatibility: Fuselink base (to fuselage) and standard top plate (to board)
• Optimised carbon layup for balanced flexural and torsional rigidity
• Significant glide and speed upgrade over HR at higher riding speeds

On the Foil

The HM's character is noticeably more direct than the HR — steering inputs translate faster, foil height corrections feel more immediate, and the mast doesn't soak up energy during pumping sequences. Riders transitioning from HR often describe the HM as feeling more 'connected' to the foil, with less lag between body movement and foil response. At higher speeds the thinner profile also pays dividends: less drag means you hold glide longer and spend less effort maintaining height on downwind runs. The HM still has a degree of forgiveness that the UHM lacks — bad landings won't jar your ankles the way they might on the stiffer grade.

Compatibility & Setup

The AFS HM Carbon Mast uses the Fuselink connection system — AFS's proprietary conical mast-to-fuselage interface, fastened by two M8 screws. The Fuselink base connects to all current AFS Fuselink fuselages (Evolution, Enduro, and dedicated Fuselink-range fuselages). The top mounts to your board via a standard US double-rail box plate or AFS board box. Fuselink is not compatible with Tuttle, Deep Power, or other industry-standard mast connections without an adapter. Riders using an older AFS Performer fuselage will need the AFS Switch Fuselage to use this mast with current wing ranges.

Construction

High Modulus carbon uses fibres with a higher Young's modulus than standard carbon — meaning greater stiffness per unit of weight. AFS uses a precision layup process that arranges HM fibre at 0° for maximum flexural rigidity and at approximately 45° for torsional control. The result is a thinner mast profile than the HR that achieves greater stiffness — which is why the HM can be slimmer without sacrificing structural performance. That thinner chord is also what gives it better hydrodynamic drag characteristics at speed.

Spec Table

Pairs Well With

Explore the full AFS range to complete your setup. Mount the HM to one of our wing foil boards and partner it with a high-performance wing foil foil for a properly dialled setup.

Why We Stock It

The HM Carbon Mast is the one we point riders towards when they've got a solid 10+ hours on the foil and are starting to feel limited by their HR mast's response. It's a significant step up in feel and glide without the demands of the race-spec UHM — and for most performance-focused riders who aren't actively racing, it's the sweet spot in the AFS range. We stock it because it's genuinely the mast we'd choose for everyday high-performance riding on the Wirral.

FAQs

What does HM mean on an AFS mast?

HM stands for High Modulus — it describes the stiffness grade of the carbon fibre used. High Modulus carbon is approximately 1.5 times stiffer than standard carbon, delivering more direct response and better energy transfer. It sits in the middle of AFS's three-tier system: stiffer than HR, less extreme than UHM.

How does the HM compare to the HR and UHM?

The HR (High Resilient) is the most forgiving — best for learning and all-round riding. The HM is stiffer, thinner, and more direct — the performance sweet spot for most advanced riders. The UHM is the stiffest of all, with maximum rigidity and minimum flex, aimed at race or top-level performance riding. The HM offers a strong balance: notably better than HR without the unforgiving nature of UHM.

Is the HM suitable for beginners?

We'd recommend the HR over the HM for beginners. The HM's stiffer response means touchdowns and early mistakes feel more immediate — that's great for performance but can be discouraging when you're still learning foil height control. Once you have 10+ consistent hours on the foil, the HM becomes a rewarding upgrade.

Which length of HM mast should I pick?

80cm is the go-to all-round length — it suits the majority of wing foiling, kite foiling, and surf foiling conditions. 85cm gives you extra clearance for bigger swell, choppier water, or longer downwind runs where mast tip-to-board distance matters. If you ride in varied conditions, 80cm is the safer starting point.

Is the AFS HM mast compatible with my board and fuselage?

The HM uses the Fuselink connection — compatible with all current AFS Fuselink fuselages. The top plate fits standard US double-rail box boards or AFS board boxes. It is not compatible with Tuttle or Deep Power box systems without an adapter. Older AFS Performer fuselage users will need the AFS Switch Fuselage.

How should I store and care for my AFS carbon mast?

Rinse thoroughly with fresh water after salt water use, especially around the Fuselink connection. Store in a mast bag and avoid point-loading or resting heavy objects on the mast. Check M8 Fuselink fastener torque before every session. Any cracks, delamination, or unexpected flex change should be reviewed before riding — HM carbon is stiffer but can be less forgiving of impact damage than HR.