Rolex GMT-Master II & Apple Watch on the same wrist

Rolex GMT-Master II & Apple Watch on the same wrist

Yes. The Rolex GMT-Master II is fully compatible with Smartlet One. All current references (Batman, Pepsi, Root Beer) use a 20mm lug width natively supported by Smartlet. Apple Watch mounts on the inner wrist via the Smartlet module. Both watches run simultaneously with no modification to either piece.
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Compatibility guide

Rolex GMT-Master II & Apple Watch on the same wrist

Rolex GMT-Master II + Apple Watch
Yes. The Rolex GMT-Master II is fully compatible with Smartlet One. All current references (Batman, Pepsi, Root Beer) use a 20mm lug width natively supported by Smartlet. Apple Watch mounts on the inner wrist via the Smartlet module. Both watches run simultaneously with no modification to either piece.
GMT-Master II lug width
20mm
Apple Watch series
All Series 4 and above
Smartlet model
Classic, Shadow or Titanium
Setup time
Under 2 minutes

Why GMT-Master II owners wear Apple Watch too

Is the Rolex GMT-Master II compatible with Smartlet One?

Compatible
Yes. The Rolex GMT-Master II is fully compatible with Smartlet One. All current references (Batman, Pepsi, Root Beer) use a 20mm lug width natively supported by Smartlet. Apple Watch mounts on the inner wrist via the Smartlet module. Both watches run simultaneously with no modification to either piece.
GMT-Master II lug width
20mm Supported
126710BLNR, 126710BLRO, 126711CHNR, 126719BLRO
Apple Watch models
All Series 4 and above
Series 9, Ultra 2, SE, all sizes
Smartlet model
Classic, Shadow or Titanium
From 299 EUR
Daily wear profile
9-12mm on inner wrist
Comparable to standard steel bracelet

Related compatibility guides

Model guide
Rolex GMT-Master II
→
Brand guide
All Rolex models
→
Smartwatch guide
Apple Watch compatibility
→

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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 GMT-Master II references work with Smartlet?
    All current GMT-Master II references are compatible: 126710BLNR (Batman), 126710BLRO (Pepsi), 126711CHNR (Root Beer), 126719BLRO (Pepsi White Gold), and 126715CHNR (Root Beer Everose). All use 20mm lug widths natively supported by Smartlet One.
  • Does wearing both affect travel comfort?
    No. The Smartlet strap is designed for all-day wear. The combined height profile adds 9 to 12mm on the inner wrist, comparable to wearing a standard steel bracelet. Most users report no discomfort after an initial adjustment period of one to two days.
  • Can I use Apple Watch world clock alongside the GMT complication?
    Yes. The two watches operate entirely independently. You can display different time zones on the Apple Watch face alongside the GMT-Master II's mechanical second time zone, giving you three time zones on one wrist if needed.
  • 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.