Foil Carbon Mast HM 70 cm V3 15mm NFJ Pré-série - 70cm Black Second Hand 12949
PROGRAM
The 70HM mast for surfing, SUP foiling and pumping.
PRESENTATION
This mast comes from the pre-production series of the HM models. It features an identical shape and contains the same amount of HM carbon as the production series. The stiffness is the same; the main difference lies in the fiber orientation of the base plate, which is not optimized to withstand the extreme stress generated by high-impact jumps.
Therefore, this mast is not designed for use involving high-intensity jumps such as those performed by our pro riders.
However, it retains all the responsiveness, stiffness and lightness of HM carbon, and will be perfect for 90% of riders who prefer glide and speed for freeride, waveriding or freestyle without airs.
An excellent choice for those who want top-quality equipment at a reasonable price, without looking for extreme jumping performance.
The 70HM carbon mast is a masterpiece of technological expertise. Glide, stiffness, lightness, and responsiveness: it’s the essential mast for foilers seeking excellence.
It allows you to unlock your full potential in high performance. Stunning accelerations, insane top speeds, instant response in carves, and highly efficient pumping.
Its construction with High Modulus Prepreg carbon increases the fiber content in the composite. More carbon and less resin make it hyper-stiff and reactive. In addition to this material work, the application is meticulously designed and calculated. Flex and twist are perfectly controlled through optimized orientations of the carbon fiber layers. Finally, the high-density core of the internal structure is reinforced with a double 50-layer carbon stringer. This results in formidable dynamics even with thinner profiles and more fluid than structural designs.
The sleek profile minimizes drag for easier takeoffs, rapid accelerations, and higher top speeds. The 70 cm length is dedicated to high-performance use in surf foil or SUP foil, but also in downwind, dock start, and beach start. It's a real joy for spots where the depth is shallow!
The lower sections, available in 15 and 19mm thicknesses, allow all riders to find their ideal glide/stiffness compromise based on their front wing, program, or body type.
Its monobloc construction in high-modulus carbon provides impeccable foil control thanks to perfect mastery of flex and twist, achieved through optimization of fiber layer orientations and an internal double carbon stringer structure.
With 10 years of mass-producing foils, GONG has been the world’s leading driver of this practice, delivering nearly 100,000 foils. This incredibly intense tenth year of R&D has enabled us to offer an even thinner mast in the V3 foil range. The lower sections of our HM masts now start from 15mm in thickness, while also offering options by 19mm.
You can thus choose the mast perfectly suited to your build, your front wing, and your program:
- If you prioritize glide and speed, the HM15 will become the centerpiece of your quiver.
- If you are sturdier or focused on pumping/light wind, and you seek unmatched rigidity for maximum precision, the HM19 is made for you!
Technical sheet
Foil Carbon Mast HM 70 cm V3 15mm NFJ Pré-série - 70cm Black Second Hand 12949 70cm / Black
Buying guide
For whom ?
For those who want the best. These masts are not reserved for experts. An intermediate rider will appreciate the advantages of these masts, which offer perfect control of the foil. Of course, HM masts become indispensable as the rider’s performance demands increase.
For what ?
The 70 cm length is dedicated to high-performance in surf foiling or SUP foiling, but also in downwind, dock start, and beach start. Excellent for spots with shallow water, regardless of the type of board.
What thickness ?
You have the choice between 2 thicknesses.
The thicker the mast, the stiffer it is and the greater control it provides, particularly with larger front wings.
The thinner the mast, the faster it is, increasing top speed and acceleration, especially with smaller wings. Here are our recommended mast thicknesses to ensure perfect stiffness of the whole setup:
- The 15mm thickness is recommended for front wings up to 150 cm wingspan.
- The 19mm thickness is recommended for front wings up to 250 cm wingspan.

Which cover?

Equipments
The mast comes with all the necessary hardware to mount it on the foil:
- 4 M6 brass square nuts
- 4 M6 bowl washer
- 7 chamfered head M6x30mm screws
- Torx T30 key
Delivery
Delivery
Orders are prepared and shipped quickly: most are dispatched within 24 to 48 business hours.
The delivery time, meaning the transit of the parcel to your address, then depends on the delivery location and the carrier.
Shipping costs are transparent and calculated based on weight, volume, and delivery address.
Exchanges & Returns
You have a 14-day right of withdrawal to return or exchange a new product that does not suit you.
Eco-Responsible Packaging
We prioritize sustainable, recyclable, and reusable packaging solutions, minimizing single-use plastic as much as possible while ensuring optimal protection for products, including large items.

