In a sea of dive watches, the Tudor Pelagos FXD 25707KN keeps things simple – designed to be worn with ease and appreciated for its clean, focused style. This time-only model was created in partnership with Alinghi Red Bull Racing and brings in elements inspired by high-performance sailing. It features a carbon composite case, a dark ocean blue dial with red accents, and a lightweight fabric strap that wears comfortably all day.
At first glance, it might look like just another sporty watch in black and blue. But once you wear it, the details start to speak. From the lightweight carbon case to the bidirectional bezel, every detail on the Pelagos FXD 25707KN is built for practical use.
Let’s take a closer look at what makes this carbon-cased Pelagos FXD a conversation piece among watch collectors and sport enthusiasts.
How the FXD Evolved Into an Alinghi Red Bull Racing Yacht-Ready Tool
The Pelagos FXD made its debut in 2021 as a purpose-built dive watch developed with the French Navy (Marine Nationale). The “FXD” name comes from its fixed strap bars, designed for extra strength and reliability when used in demanding underwater conditions.
Then in 2023, Tudor added something new to the FXD line: the 25707KN, released along with a chronograph as part of a partnership with Alinghi Red Bull Racing, a team in the America’s Cup. While it keeps the strong and practical design of earlier FXD models, this version takes inspiration from the fast-paced world of yacht racing – shifting its focus from military diving to high-performance sailing.
The 25707KN doesn’t try to be a regatta timer or diving computer. Instead, it embraces precision and toughness, packaged in a carbon composite case that feels right on a racing yacht or at the docks. The use of lightweight materials like carbon, titanium, and stainless steel gives the watch a modern touch while keeping it wearable and low-profile.
Now that we’ve covered its origins, let’s take a closer look at how the case and strap complete the picture.
The FXD Case Design: Materials That Make a Difference
Tudor used carbon composite for the first time in a production model with the 42mm case of the Pelagos FXD 25707KN. The matte black finish has a subtle texture that looks technical but never flashy. The carbon material keeps the watch light and mirrors the carbon hulls used in Alinghi Red Bull Racing’s AC75 yachts.
Inside, the watch uses 316L stainless steel for the mid-case and movement container to keep everything solid and protected. The titanium bezel edge and screw-down crown help seal the case and improve resistance to daily wear, water, and dust. It’s rated for 200 meters of water resistance, making it reliable both on land and in the water. The bezel itself is bidirectional with 120 clicks, topped with a matte carbon composite insert – a setup that suits everyday timing, especially in racing or sailing conditions. On the caseback, you’ll find the Alinghi Red Bull Racing logo – a subtle detail that highlights the partnership without making the design feel too loud.
Like all FXD models, this version uses fixed strap bars, which are more secure than spring bars and reduce the risk of a strap failure. It comes on a single-piece navy blue fabric strap woven in France, featuring a red accent stitch to echo the Alinghi team colors. The strap closes with a Velcro fastener and titanium D‑buckle for a secure fit and easy on-the-fly adjustment.
While the case and strap offer lightweight durability, it is the dial design that adds visual impact and ties it all together.
Clean Layout, Lume That Pops, and a Hint of Red
The dial on the Pelagos FXD 25707KN comes in a deep matte blue – a darker tone inspired by the racing team’s yacht. It is not as bright as the original FXD, leaning more toward royal blue for a sharper contrast against the white large hour markers. Red accents on the seconds hand and the Pelagos name at 6 o’clock add a bit of contrast without making the dial feel too busy.
The hour markers are made from solid blocks of Swiss Super-LumiNova Grade X1, so you get a strong glow when the lights go down. What’s especially cool about this model, though, is that the entire bezel insert lights up too and not just the 12 o’clock marker like most watches. That full-lume has become one of the standout details of the FXD line, making it easier to track time in the dark whether you’re on the water or just out late.
Printed along the inner ring from 10 to 2 o’clock is “Alinghi Red Bull Racing” – the only branding on the dial. From most angles, the text blends in, letting the rest of the face stay clean and easy to read.
Now that we’ve seen how the dial keeps things simple and purposeful, let’s take a look at what’s ticking inside.
Inside the Case: What Keeps the FXD Ticking
Inside the Pelagos FXD 25707KN is the Tudor Manufacture Calibre MT5602 – a self-winding movement made in-house and officially certified by COSC for precision. It runs at 28,800 vibrations per hour and has a 70-hour power reserve, giving you a full weekend of runtime even if you set it down Friday night.
Tudor protects the movement inside a stainless steel container that sits within the carbon case, helping to boost stability and shock resistance. The accuracy is also tested beyond standard COSC specs, with real-world tolerances of –2 to +4 seconds per day once cased.
Functions are simple and practical: hours, minutes, and running seconds – no date to clutter the dial. Timing is handled by a 60-minute bidirectional bezel with 120-click action and a matte carbon composite insert. So, whether you’re boiling pasta, monitoring workouts, or tracking daily tasks, it keeps timing quick and functional.
A screw-down crown in Grade 2 titanium helps seal the case to 200 meters of water resistance, making it dependable for swimming, sailing, or just getting caught in the rain.
Now that we know what makes the watch tick, let’s talk about how it actually wears.
A Tool Watch That Feels Right All Day Long
One of the first things you notice when wearing the Pelagos FXD 25707KN is just how light it feels. The case measures 42mm, but because it uses carbon composite and titanium for key parts, it comes in at around 77.5 grams on the fabric strap. That’s noticeably lighter than most watches in this size range, including many stainless steel and even some titanium models.
The fixed lugs and flat caseback help it sit low and steady on the wrist. The one-piece fabric strap with Velcro closure adjusts easily, pulls the watch in securely, and feels breathable even in warm or humid weather. It is designed to be worn for long hours without discomfort.
Even if your wrist runs on the smaller side, the matte black case helps tone down the visual size. There’s no shiny polish or glare here, just a low-profile look that blends in any outfit.
Before we wrap up, here’s a quick spec recap for collectors who want the key facts at a glance.
| Feature | Details |
| Case Size | 42mm diameter, approx. 52mm lug-to-lug |
| Case Material | Carbon composite case with titanium bezel edge and 316L stainless steel mid-case |
| Bezel | 60-minute bidirectional rotating bezel with matte black carbon composite insert, full-lume scale, and 120-click action |
| Dial | Matte blue with large white lume-filled hour markers and red accents (seconds hand and “Pelagos” text) |
| Lume | Swiss Super-LumiNova Grade X1 on hour markers and entire bezel for enhanced low-light visibility |
| Crystal | Scratch-resistant sapphire crystal |
| Crown | Titanium screw-down crown |
| Water Resistance | 200 meters / 660 feet |
| Movement | Manufacture Calibre MT5602 (COSC-certified), automatic |
| Power Reserve | Approx. 70 hours |
| Frequency | 28,800 vph / 4 Hz |
| Functions | Hours, minutes, running seconds |
| Strap | Single-piece navy blue fabric strap with red stitching and Velcro-style hook-and-loop closure |
| Weight | Approx. 77.5 grams |
| Caseback | Solid caseback with subtle Alinghi Red Bull Racing engraving |
| Branding | “Alinghi Red Bull Racing” printed along inner dial ring (rehaut), visible at an angle |
| On-Wrist Feel | Lightweight, breathable, and secure – wears flat and comfortable even on smaller wrists |
| Special Features | Fixed strap bars, sailing-inspired materials and design, low-glare matte finish |
A Watch with a Clear Job to Do
Not everyone needs a watch packed with extras. No unnecessary features, no distractions, just solid materials, reliable specs, and a clear purpose. If you want a watch built for action, not decoration, the Pelagos FXD 25707KN sticks to its purpose and does it well.
Ready to see how it really looks?
Watch our full video review of the Tudor Pelagos FXD 25707KN here.
