Delta M-Frame Masts

The Delta M-Frame Masts are the vertical connection between board and fuselage in Delta Hydrofoils' modular M-Frame platform. Available in aluminum and carbon fiber, these masts are built around Delta's philosophy of full interchangeability — every M-Frame mast works with any Delta wing and either of the two M-Frame fuselage lengths. Delta Hydrofoils, a U.S.-based brand founded in 2013, manufactures the aluminum masts domestically using a thinner-wall construction than most competitors, prioritizing low weight without sacrificing durability.

The aluminum versions ship in four lengths — 61 cm, 71 cm, 81 cm, and 91 cm — while a carbon fiber option is offered at the 81 cm length as a direct drop-in replacement. Each aluminum mast includes four M8 mounting screws; the carbon variant ships with a mast cover and four M8×25 mm fasteners. A separate carbon top plate (compatible with all Delta masts) is required to mount the mast to a board.

• Material (standard): Aluminum, thin-wall construction
• Material (premium): Carbon fiber
• Available aluminum lengths: 61 cm (24"), 71 cm (28"), 81 cm (32"), 91 cm (36")
• Available carbon length: 81 cm (32")
• Carbon mast thickness: 15 mm
• 81 cm aluminum mast weight: ~2.85 lbs (vs. ~3.84 lbs industry average)
• Mounting hardware included: Yes (M8 screws)
• Top plate: Required, sold separately
• Mounting system: Delta M-Frame

Shorter mast lengths suit newer foilers still building board-handling skills and riders who frequent shallow water, while longer options give experienced riders more leverage and clearance for steeper turns and open-water conditions. The aluminum masts are a practical choice across kite foiling, wing foiling, and surf foiling for riders who want dependable performance at a lower price point. Because aluminum absorbs impacts better than carbon, it also makes sense for riders who are still learning and likely to encounter bottom strikes.

The carbon 81 cm mast targets riders looking for increased stiffness and reduced flex under load. Delta specifically notes the benefit for larger riders and those running the bigger wings in the High Aspect line, where additional rigidity helps maintain tracking and control at speed. If you are progressing beyond entry-level foiling and want a performance upgrade without replacing the entire setup, the carbon mast slots in without any additional adapters or modifications.

Delta offers two mast platforms: the M-Frame and the R-Frame. The M-Frame is the brand's primary modular system, designed so that wings, fuselages, and masts can be mixed and matched freely. The R-Frame uses a different mounting geometry and is not cross-compatible. Within the M-Frame ecosystem, masts pair with kits like the High Aspect 1290, High Aspect 1450, Surf 1660, and the Progression HA Series, giving riders a single mast platform that spans multiple disciplines.

Compared to aluminum masts from brands at similar price points, Delta's thin-wall approach yields a notably lighter product — the 81 cm aluminum mast undercuts the typical weight by roughly a pound. The carbon upgrade at this length competes with aftermarket carbon masts from other foil brands but carries the advantage of guaranteed fit within the M-Frame system. For riders already invested in Delta's ecosystem, stocking multiple mast lengths is a cost-effective way to adapt the same foil to different conditions and riding styles.