Duotone Adapter Fuselage - F-One

The Duotone Adapter Fuselage - F-One is a brand-specific mounting adapter that connects an F-ONE foil fuselage to Duotone's electric Foil Assist aluminum mast system. Produced by Duotone under their electric foiling division, this adapter bridges two otherwise incompatible foil ecosystems, letting riders who already own F-ONE foils add electric-assisted takeoff capability without replacing their entire setup. The adapter is sold separately from both the Foil Assist sets and the F-ONE foils it links together.

Duotone's Foil Assist platform uses a proprietary mast-to-fuselage interface, so each third-party foil brand requires its own dedicated adapter. The F-One variant addresses riders invested in the F-ONE ecosystem — specifically those using the F-ONE Titan 1 fuselage — who want to integrate Duotone's jet-powered assist motor for self-launching and light-wind sessions.

• SKU: 40260-6601
• Compatible masts: Foil Assist Mast AL, Foil Assist Cruise Mast AL (aluminum masts only)
• Compatible foil brand: F-ONE (Titan 1)
• Available sizes: One size

This adapter targets intermediate to advanced wing foilers and kite foilers who already ride F-ONE foils and want to add Duotone's electric Foil Assist system to their quiver. The Foil Assist motor provides up to 33 kg of thrust, designed to help riders get on foil in marginal wind or flat water without needing a dedicated e-foil board. Riders who frequently session in light or inconsistent wind will find the most value here, since the assist motor can bridge lulls and eliminate the need for water starts in underpowered conditions.

Because the adapter works exclusively with Duotone's aluminum Foil Assist masts — not the D/LAB carbon variant — buyers should confirm they are running or planning to purchase an AL-series mast before ordering. This is a component-level purchase suited to riders comfortable assembling modular foil setups rather than those looking for an out-of-the-box solution.

Duotone offers a full range of fuselage adapters to pair their Foil Assist system with third-party foils from brands including Axis, Gong, Lift, North, Code Foils, AFS, SAB, and KT, alongside their own Duotone-native fuselage. The F-One adapter fills a specific gap in that lineup for riders committed to F-ONE gear. Each adapter is a separate accessory purchase on top of the core Foil Assist AL Set or Foil Assist Cruise Set, which ship with the eMast, eHarness, remote, batteries, and charger but no fuselage adapter included.

For riders comparing electric assist options within the F-ONE ecosystem itself, F-ONE does not currently offer a comparable first-party electric assist mast, making Duotone's adapter one of the few paths to electrified foiling without abandoning an existing F-ONE wing and fuselage investment.