Tendon Joint Raceboard UF Essentials (U-Pin)
Low-Profile Precision for Proteus and Phantom Boards
Built for speed, control, and compatibility, the Raceboard UF Essentials Tendon Joint is the go-to solution for Unifiber Proteus V1 & V2 and Starboard Phantom models (2021+). The low-profile design brings your rig closer to the board, helping you close the gap and stay locked in across the course.
At the heart of the system is a high-grade TPU tendon, secured with two oversized custom bolts for quick, easy replacement without risk of over-tightening. A solid stainless-steel U-pin provides a secure mast connection built to last season after season—while weighing around 50g less than most alternatives.
A precision-shaped nylon pad ensures smooth glide over the mast track, securely locking into the carriage without sacrificing fluid movement.
And for peace of mind during every session, a Spectra safety rope rated to 650 kg connects the top and bottom—ready for anything the race throws your way.
Why racers choose it:
- Direct connection = faster reaction + better “gap closing”
- Compatible with Unifiber Proteus and Starboard Phantom (2021+)
- Super light without sacrificing strength
- Safe, simple, and easy to maintain
Regular inspection of your baseplate is crucial for safety and performance.
Here's what you need to check before hitting the water:
Power/Boge Joint Inspection:
- Check rubber for deterioration, cuts, or drying
- Look for splitting at top/bottom sections
- Test flexibility in all directions
Tendon Joint Inspection:
- Look for wear and cuts, especially around bolt holes
- Test flexibility gently
- Pay attention to bolt hole areas
Replacement Guidelines:
- Tendon joints: Replace annually or after 120 hours of use
- Power/Boge joints: Replace when showing wear or damage
- When replacing U-pins in Power/Boge joints, applying heat can help break down glue for easier removal
Remember: A quick pre-session check of your baseplate can prevent equipment failure and keep you safe on the water.
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Expert Advice
Windsurfing Baseplate FAQs
When it comes to windsurfing, the baseplate is often underestimated as just a simple connection point between the board and the rig.
The baseplate is a sophisticated component of your windsurfing setup, serving as the critical link in your entire system. It plays a vital role in power transmission, shock absorption, and responsiveness to sailing conditions.
Choosing the right baseplate can significantly impact your windsurfing performance, safety, and overall experience.
This FAQ aims to provide you with the necessary information to help you choose the perfect baseplate for your riding style and conditions.
There are three main types:
- Power/Boge Joint: Great shock absorbers with more sideways movement
- Tendon Joint: Stiffer with less lateral movement
- Cardan Joint: Easily pivoting, ideal for inflatable WindSups
Power Joint is an imitation of the original Boge Joint. The Boge Joint is slightly more expensive and has an unconfirmed reputation for longer lifespan, but both function similarly.
It depends on your use:
- For shock absorption: Power/Boge Joint
- For direct feel and less movement: Tendon Joint
- For inflatable WindSups: Cardan Joint
Unifiber RDM masts stay at a constant 33 mm. internal width up to 600 mm. into the base section. Beyond 600 mm. the internal width tapers to 32 mm.
Unifiber Baseplates: Engineered for Reliability
Built to Last
Our commitment to excellence shows in every baseplate we make.
From premium materials to precision-engineered joints, each component undergoes extensive testing to ensure flawless performance in demanding conditions.
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Baseplate Fundamentals
What's the difference between a baseplate and a deck plate?
There is no difference - they are two names for the same part. We use the term baseplate for simplicity.
What are the main pin systems available for baseplates?
There are two main systems:
- U-Pin: The most commonly adopted standard, featuring ergonomic push-button or trigger mechanisms
- US-Push Pin (US-Cup): Widely used in America, requiring simultaneous pressing of two pins to disconnect
What are the advantages and disadvantages of each pin system?
- U-Pin advantages: More ergonomic operation, easier to connect/disconnect
- US-Push Pin advantages: Very robust system
- US-Push Pin disadvantages: Less ergonomic, more play between baseplate and extension
There is no difference - they are two names for the same part. We use the term baseplate for simplicity.
There are two main systems:
- U-Pin: The most commonly adopted standard, featuring ergonomic push-button or trigger mechanisms
- US-Push Pin (US-Cup): Widely used in America, requiring simultaneous pressing of two pins to disconnect
- U-Pin advantages: More ergonomic operation, easier to connect/disconnect
- US-Push Pin advantages: Very robust system
- US-Push Pin disadvantages: Less ergonomic, more play between baseplate and extension
Windsurf Baseplate Knowledge