Delta R-Frame Mast BLEM

The Delta R-Frame Mast BLEM is a cosmetically blemished version of Delta Hydrofoils' flagship R-Frame mast, offered at a reduced price. "BLEM" indicates minor cosmetic scratches near the base plate mounting holes — imperfections visible only on close inspection that do not affect structural performance. The R-Frame represents Delta's integrated approach to hydrofoil mast design: rather than bolting a separate top plate, mast strut, and fuselage together, the R-Frame consolidates all three into a single carbon fiber component. This eliminates both the mast-to-plate and mast-to-fuselage joints, creating a direct carbon load path from the board to the front wing. The rear fuselage section remains detachable, so the assembly still breaks down for transport.

• Length: 32" / 82 cm
• Chord: 11.5 cm
• Thickness: 1.8 cm
• Construction: One-piece carbon fiber (integrated top plate, mast, and front fuselage)
• Package includes: Mast with integrated plate and front fuselage, (2) M8 x 25mm Torx screws
• Regular retail price: $999.00 USD

The R-Frame Mast suits intermediate to advanced foil riders who prioritize stiffness and direct board-to-wing connection over the modularity of a multi-piece setup. Riders pushing into higher speeds or flying larger high-aspect wings — where flex in the mast-to-fuselage junction becomes noticeable — stand to benefit most from the integrated construction. The one-piece design reduces the number of bolted joints that can loosen or introduce play over time, which matters for riders logging frequent sessions.

Because the front fuselage length is fixed as part of the mast, this setup is less modular than Delta's M-Frame system, where components swap freely. Riders who want to experiment with multiple fuselage lengths on a single mast may prefer the M-Frame Carbon Mast instead. The R-Frame is the choice for pilots who have dialed in their preferred fuselage geometry and want the stiffest possible platform at that configuration.

Delta Hydrofoils offers two mast frame systems. The M-Frame line uses a traditional bolted architecture where the top plate, mast, fuselage, and wings are all separate, interchangeable parts — versatile for riders still exploring setups. The R-Frame sits above it as the performance-oriented option, trading some modularity for a stiffer, lighter-jointed structure. Delta's standard Carbon Mast, priced at $549 in the M-Frame format, serves as the more affordable entry into their carbon mast lineup.

The BLEM designation makes this particular unit a value option for riders who want R-Frame rigidity without paying full retail. At $849, it sits roughly 15% below the standard R-Frame Mast price of $999. For buyers comparing across brands, the integrated mast-fuselage concept is similar in philosophy to one-piece mast designs from brands like Axis and Uni Foil, though Delta's rear-detachable fuselage adds a degree of adjustability that fully integrated competitors do not offer.