339 Best Hydrofoil Stabilizer
The U-420 is a carbon-fiber hydrofoil rear stabilizer with a listed surface area of 339 cm² and span of 42 cm. Confirm the fuselage connection and front-wing pairing before ordering.
U-420 Stabilizer Specifications
- Model: U-420
- Area: 339 cm²
- Span: 42 cm
- Material: Carbon composite
- Connection: Lap type listed; insert-style option can be reviewed
OEM dimensions, finish, logo and packaging can be reviewed from drawings or samples.
The hydrofoil stabilizer, some people also call it a hydrofoil rear wing, which is a part used to improve the stability and control of the foil board. It consists of a small hydrofoil, which is a wing-like structure that extends below the waterline of the vessel. The primary role of a hydrofoil back wing is to reduce the rolling motion of the foilboard, which is particularly important in rough seas.

As the best hydrofoil stabilizer in Unity Sports, this is an exceptional foil-backed wing stabilizer renowned for its robust performance, capable of withstanding over 150 kilograms of force without easily succumbing to wear and tear during water foil surfing activities. Its remarkable durability owes much to the innovative use of cutting-edge materials, specifically carbon composites, in its construction.
If you are interested in how the hydrofoil works, please click the link.
- Area: 339SQcm
- Length: 42cm (16.5inch)
- Width: 10.3cm (4.0inch)
- Volume: 236100mm³
Meanwhile, we provide OEM service, we welcome customers to do their own design. For more details, welcome to send an inquiry to us. Or if you want to know more about other hydrofoil parts, please click to have a check.
The U-420 is a carbon-fiber hydrofoil rear stabilizer with a listed area of 339 cm² and span of 42 cm. It should be selected as part of a complete foil system, not from surface area alone.
Stabilizer Fit and Connection
The current product information describes a lap-type installation and notes that an insert-style option can also be reviewed. Confirm the fuselage interface, fasteners and front-wing pairing from drawings or a sample before ordering. A similar wing area does not guarantee compatible mounting or the same riding response.

OEM and ODM Options
For a customer program, we can review stabilizer dimensions, profile, carbon composite construction, finish, color, logo and packaging. Share the intended front wing and fuselage connection so a suitable platform or custom tooling route can be assessed.
Testing and Quotation
Structural or load tests should be specified with the tested setup and acceptance criteria. The existing listing mentions a load claim, but it does not provide enough test details to assign a universal rating to this U-420 variant. Send drawings, expected quantity and branding requirements for a sample and quotation review.
Compare the 400 model rear wing and our hydrofoil manufacturing program.
Frequently Asked Questions
What are the U-420 rear stabilizer dimensions?
The listed area is 339 cm² and the listed span is 42 cm. Confirm all connection dimensions from the drawing before ordering.
How does this stabilizer connect to the fuselage?
A lap-type connection is listed, and an insert-style option can be reviewed. The mating fuselage interface and fasteners must be confirmed.
Can the U-420 be customized for an OEM foil system?
Yes. Geometry, composite construction, finish, logo and packaging can be reviewed from customer drawings or samples.



































