Tudor Black Bay & Fitbit Air on the same wrist

Tudor Black Bay & Fitbit Air on the same wrist

Yes. The Tudor Black Bay is compatible with Smartlet One via its 18mm / 20mm / 22mm lug width, with a dedicated Fitbit Air adapter. The Black Bay mounts on the outer wrist; the Air keeps full skin contact on the inner wrist.
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Compatibility guide

Tudor Black Bay & Fitbit Air on the same wrist

Tudor Black Bay + Fitbit Air
Yes. The Tudor Black Bay is compatible with Smartlet One via its 18mm / 20mm / 22mm lug width, with a dedicated Fitbit Air adapter. The Black Bay mounts on the outer wrist; the Air keeps full skin contact on the inner wrist.
Tudor Black Bay lug width
18mm / 20mm / 22mm
Fitbit Air compatibility
Screenless tracker (2026)
Adapter
Dedicated Fitbit Air adapter
Sensor architecture
Full skin contact

Why modern enthusiasts pair the Black Bay with Fitbit Air

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Is the Tudor Black Bay compatible with Fitbit Air on Smartlet?

Compatible
Yes. The Tudor Black Bay is compatible with Smartlet One via its 18mm / 20mm / 22mm lug width, with a dedicated Fitbit Air adapter. The Black Bay mounts on the outer wrist; the Air keeps full skin contact on the inner wrist.
Tudor Black Bay lug width
18mm / 20mm / 22mm Supported
Standard spring-bar system
Fitbit Air model
Screenless tracker (2026)
Dedicated Fitbit Air adapter
Sensor architecture
Full skin contact
Inner wrist position
Reversible
In seconds
No modification to the watch

Related compatibility guides

Model guide
Tudor Black Bay
→
Brand guide
All Tudor models
→
Smartwatch guide
Fitbit Air compatibility
→

More ways to wear Smartlet

Tudor Black Bay + Apple Watch
Tudor Black Bay
→
Rolex Submariner + Fitbit Air
Rolex Submariner
→
Rolex Datejust + Fitbit Air
Rolex Datejust
→

Step by step

Replace your strap
01

Replace your strap

Smartlet replaces your mechanical watch strap via the standard spring-bar system. Classic, Shadow, or Titanium. No tools required.

Connect your wearable
02

Connect your wearable

Smartlet uses a dedicated adapter or native lug pins depending on your smartwatch. The connector snaps onto the Smartlet module. Zero modification to the mechanical watch.

Wear both simultaneously
03

Wear both simultaneously

Both watches sit on the same wrist. All smartwatch sensors maintain direct skin contact and operate normally.

Questions

Frequently asked questions

  • Which Black Bay references work with the Air on Smartlet?
    References across 18mm / 20mm / 22mm lug widths are covered via the standard spring-bar system; the Black Bay model guide lists every reference.
  • Does the 22mm Black Bay 41 fit Smartlet?
    Yes. Smartlet natively supports 18mm to 24mm, so the 22mm Black Bay 41 mounts directly via its spring bars.
  • Is the Air comfortable on the inner wrist all day?
    Its thin, screenless profile is designed to disappear against the skin; combined with Smartlet's contoured module, most wearers forget it is there.
  • Smartletは機械式時計にダメージを与えたり、改造したりしますか?
    いいえ。Smartletは既存のバネ棒システムを使用して、標準的な時計ベルトを交換します。時計ケース、ラグ、またはダイアルに永続的な改変を加えません。このプロセスは数秒で完全に可逆的です。機械式時計は影響を受けず、元のベルトを再度取り付けることでいつでも独立して着用できます。Smartletは時計職人の精度で設計され、それが組み合わせられる時計と同じ注意深さでテストされています。