A COROS Pace 4 Pro is real, and we know it because COROS's Indonesian distributor just filed the paperwork to sell one.
The watch showed up in Indonesia's SDPPI regulatory database under model number W337, filed by PT Denka Pratama Indonesia, COROS's distributor in the country. The certificate number reads 125116/DJID/2026. Regulatory filings like this don't happen for vaporware, and according to the5krunner, who broke the story, they typically point to a launch within weeks.
Why W337 Matters More Than the Name
Here's the detail that makes this interesting. The current Pace 4 carries model number W336 and FCC ID 2BBGF-W336. This new filing is W337, the very next number in sequence from the same company.
COROS doesn't hand out new hardware codes lightly. If the Pace 4 Pro were just a color refresh or a strap change riding on existing Pace 4 hardware, it would keep the W336 designation. A fresh model code means fresh hardware. WearableFans flagged this point explicitly: whatever COROS is shipping as the Pace 4 Pro, it's a new device, not a repackage.
And that's the angle worth paying attention to. The "Pace 4 Pro" name suggests a modest step up from the Pace 4, but everything about the filing suggests it will be an all new watch wearing the Pace badge.
What We Actually Know (Which Is Almost Nothing Else)
Let's be honest about what the leak contains and what it doesn't:
Confirmed by the filing:
- Device name: Coros Pace 4 Pro
- Model number: W337
- Certification: SDPPI certificate 125116/DJID/2026
- Filed by COROS's Indonesian distributor
Not confirmed:
- No images
- No spec sheet
- No price
- No display size
- No battery numbers
That's the whole leak. One line in a regulatory database and a name.
The Informed Guesses
WearableFans speculates on three likely upgrades: an improved display, a better build with titanium possibly entering the picture, and improved offline mapping. Take all three with a grain of salt, since nothing backs them up yet.
But they line up suspiciously well with the gap in COROS's current lineup. The Pace 4 is a 31 gram ultralight with a 1.2 inch AMOLED display, dual-frequency GPS, and no offline maps. The Pace Pro sits above it with a 1.3 inch AMOLED screen, full mapping, and a faster processor, but it launched back in October 2024.
A Pace 4 Pro with a larger display and mapping would effectively fold the Pace Pro formula into the fresher Pace generation. Community chatter on the r/Coros subreddit has been heading in this direction for months. In the 2026 roadmap thread, several users argued that the original Pace Pro was really COROS's AMOLED experiment, and that the true successor would be a larger, mapping-capable Pace. One user flat out predicted it would be called the Pace 4 Pro.
Where Does That Leave the Pace Pro?
That's the open question. If the Pace 4 Pro lands with mapping and a bigger screen, the two year old Pace Pro loses its reason to exist. COROS could quietly retire it, or it could be setting up a wider reorganization of the whole Pace family.
There's also the timing to consider. COROS teased a new Vertix-level watch for its August 19 announcement tied to UTMB. If the Pace 4 Pro is weeks away per the filing logic, it may not appear at the same event. More likely it gets its own dedicated announcement later in the year, the way COROS handled the Pace 4 launch.
No FCC Filing Yet
We checked the FCC database for a matching W337 filing under COROS's grantee code, and nothing has landed in the US yet. Indonesia's SDPPI is the first regulatory appearance we've seen. The FCC filing usually follows, and when it does, we typically get photos and more detail in the process. We'll be watching for it.
Bottom Line
The COROS Pace 4 Pro is real hardware, confirmed by regulatory filing, not just rumor mill chatter. The sequential W337 model code right after the Pace 4's W336 tells us it's a new device, and the speculation around titanium, a bigger display, and offline mapping suggests COROS is building a genuinely new watch and parking it under the Pace name rather than just polishing the existing one.
If the filing-to-launch pattern holds, expect something official within weeks. We'll update this article the moment the FCC filing or a teaser appears.