Delta R-Frame Mast USED

The Delta R-Frame Mast is a one-piece carbon fiber foil mast system from Delta Hydrofoils that integrates the top plate, mast strut, and front fuselage section into a single molded component. By eliminating the traditional bolted joints between the mast and mounting plate as well as between the mast and fuselage, the R-Frame design creates a direct, rigid load path from the board down to the front wing. The rear section of the fuselage remains detachable, so the assembly breaks down into a compact package for transport despite its integrated construction.

Delta Hydrofoils, based in the United States, developed the R-Frame around the goal of maximizing structural stiffness without sacrificing the modular versatility that characterizes their foil platform. The system is central to Delta's current High Aspect lineup and serves as the structural backbone of their Progression and Performance kit series.

• Mast length: 85 cm (listed by manufacturer)
• Chord: 11.5 cm
• Thickness: 1.8 cm
• Material: Carbon fiber (single-piece molded)
• Integrated components: Top plate, mast strut, front fuselage
• Rear fuselage: Detachable (sold separately in kits)
• Included hardware: Two M8 × 25mm Torx screws
• Retail price (new): $999.00 USD

The R-Frame Mast targets intermediate to advanced foil riders who prioritize stiffness and direct power transfer over budget considerations. Riders stepping up from a standard two-piece aluminum or carbon mast setup will notice the reduction in flex and play at the connection points, which translates to more precise input at the front wing — particularly relevant at higher speeds and in choppier conditions where structural flex can introduce unwanted feedback.

Because the R-Frame is designed around Delta's High Aspect wing platform, it pairs naturally with their larger-span, lower-chord front wings used in disciplines like downwind foiling, light-wind winging, and open-ocean prone foiling. Heavier riders or those flying Delta's bigger High Aspect front wings (1280 cm² and above) stand to benefit most from the added rigidity, as joint flex tends to become more pronounced under higher loading.

Within Delta's own catalog, the R-Frame Mast sits above the standard Carbon Mast ($549 new), which is a conventional drop-in strut with a slim 15 mm profile that bolts to a separate plate and fuselage. The Carbon Mast offers a straightforward stiffness upgrade over Delta's aluminum mast, while the R-Frame represents a more fundamental structural redesign. Delta packages the R-Frame into their Progression High Aspect Series and Performance High Aspect Series complete kits, both priced at $1,949, indicating the mast's role as the platform's flagship structural element.

As a used unit in A+ condition, this listing offers entry into the R-Frame system at roughly 80 percent of retail — a meaningful discount on a component that rarely appears on the secondhand market due to limited production volumes. Riders already invested in Delta's wing and fuselage ecosystem can adopt the R-Frame without changing the rest of their setup, since rear fuselage sections and front wings remain cross-compatible within the platform.