Duotone Unit Foil Wing Front Tube Bladder Spare

The Duotone Unit Foil Wing Front Tube Bladder Spare is a premium factory replacement part designed to restore the structural integrity and high-pressure performance of your wing. The front tube (leading edge) forms the rigid framework of the Duotone Unit; if your wing is losing air due to a puncture, blowout, or aging valve, replacing the bladder ensures your wing returns to factory-spec inflation.

These genuine replacement bladders are available for all model generations spanning from 2021 through 2026, across the full spectrum of wing sizes.

Key Performance Features

• Year and Size-Specific Geometry: Duotone redesigns the profile, diameter, and canopy tension of the Unit every year to maximize performance. These spares are precision-molded to match the exact specifications, taper, and length of your specific model year (2021–2026) and wing size (from 2.0m up to 6.5m+).

• High-Quality TPU Material: Constructed from premium, lightweight Thermoplastic Polyurethane (TPU). This material provides maximum elasticity, extreme puncture resistance, and cold-weather flexibility while remaining thin enough to keep the wing’s swing-weight low.

• Factory-Welded Max Flow Valves: Comes equipped with original, pre-installed Duotone inflation valves. The welds are reinforced to handle high-pressure inflation limits, ensuring a perfect seal and compatibility with Duotone pumps.

• Seamless Water Performance: Engineered for optimal air retention. A correctly fitted genuine bladder ensures the leading edge maintains its aerodynamic arc without twisting or wrinkling under high wind loads.

Technical Selection Matrix

Because Duotone updates its wing geometries annually, ensuring a correct match is vital for a wrinkling-free installation.

Production Year Group	Model Compatibility	Size Range Availability	Key Characteristics
2021 – 2022	Unit V1 / V2	3.0m – 6.5m	Original profile curve; standard factory diameter valves.
2023 – 2024	Unit V3 / SLS / D-Lab	2.0m – 6.5m	Adapted for rigid SLS (Penta TX) and D-Lab (Aluula) frames.
2025 – 2026	Unit / SLS / Concept Blue	2.0m – 6.5m+	Tailored to the modern segmented leading-edge layouts.

Installation Tips & Best Practices

1. Choose the Exact Match: Double-check the small cloth tag on your wing's trailing edge or inflation point to confirm the exact year, design variation (Original, SLS, or D-Lab), and square meter size before purchasing.

2. Use a Pull-Line: Always tie a retriever line (or old kiting line) to the tips of the old bladder before pulling it out of the Dacron sleeve. This gives you an easy guide track to pull the new spare back into position without twisting it.

3. Talcom Powder: Dusting the new bladder lightly with talcum powder prior to insertion minimizes friction against the interior Dacron wall, helping it unfold uniformly without catching, bunching, or creating localized stress concentrations during inflation.