Wear a smartwatch with your Tudor Black Bay 58 GMT

Wear a smartwatch with your Tudor Black Bay 58 GMT

Smartlet is compatible with the Tudor Black Bay 58 GMT. All references use a standard 20mm lug width, natively supported with no adapter. Installation uses the standard spring-bar system, fully reversible in seconds.
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Tudor Black Bay 58 GMT compatibility

Wear a smartwatch with your Tudor Black Bay 58 GMT

In short Smartlet is compatible with the Tudor Black Bay 58 GMT. All references use a standard 20mm lug width, natively supported with no adapter. Installation uses the standard spring-bar system, fully reversible in seconds.

Introduced at Watches and Wonders 2026, the Black Bay 58 GMT brings the dual-time complication into the 39mm mid-size case: black and burgundy 24-hour bezel, gilt dial, Master Chronometer MT5450-U calibre and 200m water resistance in a 12.8mm profile. The 20mm lug width is standard across the range. Smartlet One replaces the bracelet and positions your smartwatch on the same wrist, with the GMT untouched.

Wear yours How it works
The problem
Choosing between health data and horological heritage every morning.
The solution
Smartlet One replaces your Tudor Black Bay 58 GMT's strap via the standard spring-bar system and positions your smartwatch on the same wrist. Both watches run simultaneously, with no modification to the watch and full reversibility in seconds.
Model
Tudor Black Bay 58 GMT
Lug width
20mm
References
2covered
Reversible
In seconds

Choose your edition

One mechanism. Three personalities.

Every Smartlet One includes the dedicated adapter for your wearable. Pick the finish that matches your style.

Smartlet One - Shadow - Smartlet

For the explorer

Smartlet One - Shadow

€399,00

4.9 (14)

Stealth. Switch in seconds, leave no trace.

  • Material SS316L steel, black PVD
  • Weight ~100g
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Compatibility

Tudor Black Bay 58 GMT models supported

Covered references

2 references covered.

ReferenceMaterialDialLugSmartlet
M7939G1A0NRU-0001SteelBlack gilt, rivet bracelet20mmCompatible
M7939G1A0NRU-0003SteelBlack gilt, five-link bracelet20mmCompatible

Tudor Black Bay 58 GMT lug widths: 20mm

Introduced at Watches and Wonders 2026, the Black Bay 58 GMT brings the dual-time complication to the 39mm mid-size case. Black and burgundy 24-hour bezel, gilt dial, Master Chronometer MT5450-U calibre, 200m water resistance, 12.8mm thick. Standard 20mm lug width, fully compatible with Smartlet One.
Frequently paired

Smartwatches worn with Tudor Black Bay 58 GMT

The most common combinations our customers wear. Find your mechanical watch and discover the right Smartlet edition.

Apple Watch
Series 0 to Ultra 3
Whoop
5.0 / MG
Garmin Forerunner
255 to 965
Samsung Galaxy Watch
Series 4 to 7
Withings ScanWatch
Light / 2 / Nova
View all brands
27 brands covered
Also compatible

Other brands

Other iconic models in the Smartlet compatibility library.

Submariner
Daytona
GMT-Master
Datejust
Yacht-Master
Sky-Dweller
Explorer
Seamaster 300 m
Speedmaster
Planet Ocean
Constellation
De Ville
Monaco
Carrera
Formula 1
Aquaracer
Portugieser
Navitimer
Superocean
Avenger
Black Bay
Pelagos
Ranger
Luminor
Radiomir
Submersible
SKX
Prospex
Presage
Khaki Field
BR 03-92
Cinquante brasses
Reverso
SUB 300
Spring Drive
Essence légère
Aquis
Plongeurs soixante-cinq
Chronographe 1
Capitaine Cook
L'héritage de Superman
El Primero
Tout afficher
Monarch
View all models
Watch brand compatibility guide

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

  • Does Smartlet work with the Tudor Black Bay 58 GMT?
    Yes. The 2026 Black Bay 58 GMT (references M7939G1A0NRU-0001 and -0003) uses standard 20mm spring-bar lugs, natively supported by Smartlet One with no adapter.
  • Does Smartlet affect the GMT function or water resistance?
    No. Smartlet attaches at the lug ends via spring bars. The MT5450-U calibre, the 24-hour bezel and the 200m water resistance are completely untouched.
  • Which Black Bay 58 GMT bracelet versions are compatible?
    Both launch versions are compatible: the rivet-style three-link bracelet and the five-link bracelet with T-fit clasp. Smartlet One replaces either via the standard 20mm spring bars.
  • Does Smartlet damage or modify my mechanical watch?
    No. Smartlet replaces your standard watch strap using the existing spring-bar system. It makes no permanent modification to the watch case, lugs, or dial. The process is fully reversible in seconds. Your mechanical watch is unaffected and can be worn independently at any time by reinstalling its original strap. Smartlet is engineered to watchmaker tolerances and tested with the same care that goes into the watches it pairs with.