The Pelagos FXD has that rare thing: it looks purpose-built without trying too hard. Fixed bars, no nonsense, and a vibe that leans Marine Nationale without turning into cosplay. The 25707B in particular is the one people picture when they say “FXD”, even if you know the reference rabbit hole gets deeper fast.
It is also one of those Tudors where the strap is half the personality. Change the strap and the whole watch shifts, from tool watch to relaxed daily wear in about thirty seconds.
Strap size and fit guide (read this so you do not order the wrong one)
Your Tudor Pelagos FXD 25707B is a 42mm case with a 22mm lug width. That 22mm matters, because the FXD wears broad and flat, and a strap that is even slightly off just looks wrong on the wrist.
On Helvetus product pages for this model, it is simple: you do not need to select a fit option. These straps are made specifically for the Tudor Pelagos FXD, so they are set up to fit the watch by default. The only real “choice” is picking the color you want, which is the fun part.
If you have been shopping straps for other Tudors, this is where people get tripped up. The FXD is its own thing, and you want straps that are designed around that shape and wearing style.
The best strap choices for the Pelagos FXD 25707B
With the FXD, I always think in terms of balance. The case is matte, the lines are sharp, and it has that “ready for saltwater” energy. The strap should either match that clean utility, or deliberately soften it.
The Navy Blue / Grey option is the most natural pairing if you like the watch to feel “official” without being stiff. It echoes the blue tones and keeps everything crisp, especially when you wear the FXD with simple clothes. It is sporty, but not loud, and it makes the dial feel even cleaner because the white detail breaks up the strap just enough.
Tudor FXD Navy Blue/Grey Watch Strap
If you want the watch to disappear into your day and just feel right from morning to night, go Navy Blue. This is the one I would travel with. It keeps the watch looking purposeful, does not fight the case finish, and it works whether you are in a hoodie or a collared shirt. The FXD can look surprisingly sleek when the strap is a single, deep color.
Tudor FXD Navy Blue Watch Strap
Now, if you actually enjoy straps and want the FXD to have a bit of personality, the Green / Red combo is where it gets interesting. On paper it sounds bold. On wrist, it feels more like a confident accent. The FXD is such a serious-looking watch that a strong color pairing can make it feel more playful without turning it into a gimmick. I especially like this one when the rest of your outfit is muted and you want the watch to be the one “detail” that pops.
Tudor FXD Green/Red Watch Strap
And the best part is you are not limited to just these. The FXD is one of those watches where rotating colors keeps it fresh, and you can see the full range in the collection.
Picking the right FXD strap on Helvetus
If you are buying specifically for the Tudor Pelagos FXD 25707B, stick to straps that are built around the FXD shape and dimensions. That is exactly what this Helvetus collection is for, and it saves you from second-guessing fit or compatibility.
All Tudor FXD Watch Straps
I would personally start with either Navy Blue or Navy Blue / White, then add the Green / Red when you want a different mood. And if you are the type who wears the FXD constantly, having a couple of colors ready makes the watch feel new again without buying another watch.
Closing thoughts
A good FXD strap should feel like it belongs on the watch, not like you forced it to work. That is why straps designed specifically for the Pelagos FXD are the smart move: you get the right fit for this 42mm, 22mm-lug setup without fiddling around. Helvetus backs that with a lifetime warranty, free worldwide shipping, and no import costs, and the brand has been trusted by 30,000+ customers worldwide, which matters when you are buying something you will actually wear hard.
