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Owners Thread Fitbit Air Strap Through Watch Lugs to Wear Tracker Under a Watch

Users are slipping the Air’s removable 18mm loop through watch spring bars so a single band holds a watch on top and the tracker beneath the wrist.

Overview

  • Tech sites reported on Thursday that Reddit users and creators are sharing step‑by‑step posts showing how to slide the Fitbit Air strap through watch spring bars to pair an analog or digital watch with the tracker.
  • The DIY method leaves the Air body attached, removes the watch strap while keeping the spring bars, and runs the Air’s Performance Loop through the lugs like a single‑pass NATO band so the tracker sits under the wrist.
  • Fitbit Air’s minimalist, screenless sensor chassis and 18mm strap width make the combo physically possible and some users say the sensor still tracks acceptably when worn beneath a watch.
  • Google has not endorsed this user modification but has published official band design files that could let third‑party makers produce near‑OEM straps or adapters to better support combined setups.
  • The wider effect could be more third‑party bands and community‑made adapters that let people keep traditional watches while using a low‑profile tracker, changing how some users choose to wear health sensors.