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Wear a smartwatch with your Rolex Cosmograph Daytona | Smartlet

Rolex compatibility guide

Wear a smartwatch
with your Rolex Cosmograph Daytona

Smartlet is compatible with the Rolex Cosmograph Daytona. Lug width: 19mm / 20mm - natively supported with no adapter. Installation uses the standard spring-bar system. No modification to the watch required. Fully reversible in seconds.

The Daytona was designed for endurance racing drivers. Its tachymetre bezel calculates average speed over a known distance. The in-house 4130 movement powers 72 hours of reserve with a column-wheel chronograph mechanism that rivals movements twice its price. Smartlet replaces your Daytona strap and clips your Apple Watch or Garmin onto the same wrist via its native 20mm lug. Your lap times and your heart rate. Both recorded simultaneously.
ModelRolex Cosmograph Daytona
Lug width19mm / 20mm
Case size40mm
MovementCal. 4130
Water resistance100m
Introduced1963
Smartlet compatibleYes
References

Covered references

Reference Smartlet Lug width Case Case material Dial
116509 Compatible 20mm 40mm White Gold Blue
116509 Compatible 20mm 40mm White Gold Black
126508-BK Compatible 20mm 40mm Yellow Gold Black
116508 Compatible 20mm 40mm Yellow Gold Green
116508 Compatible 20mm 40mm Yellow Gold Champagne
6239-PN Compatible 20mm 40mm Steel White/Black
6239 Compatible 19mm 40mm 904L stainless steel Silver Panda
6239 Compatible 19mm 40mm 904L stainless steel Black Reverse Panda
6241 Compatible 19mm 40mm 904L stainless steel Black Exotic
6239 Compatible 19mm 40mm 904L stainless steel Cream Exotic
6239 Tiffany Compatible 19mm 40mm 904L stainless steel Cream Exotic
6263 Compatible 20mm 40mm 904L stainless steel Black
6265 Compatible 20mm 40mm 904L stainless steel Silver
16520-BK Compatible 20mm 40mm Steel Black
16520-WH Compatible 20mm 40mm Steel White
16520-BK Compatible 20mm 40mm Steel Black
16520 Compatible 20mm 40mm 904L stainless steel White
116520-BK Compatible 20mm 40mm Steel Black
116520-WH Compatible 20mm 40mm Steel White
116523-WH Compatible 20mm 40mm Steel/Gold White
116520 Compatible 20mm 40mm 904L stainless steel Black
116505 Compatible 20mm 40mm Everose gold Chocolate
116505 Compatible 20mm 40mm Everose gold Black
116506 Compatible 20mm 40mm Platinum Ice Blue
116500LN-BK Compatible 20mm 40mm Steel Black
116500LN-WH Compatible 20mm 40mm Steel White
116500LN Compatible 20mm 40mm 904L stainless steel White
116503 Compatible 20mm 40mm Rolesor yellow White
116503 Compatible 20mm 40mm Rolesor yellow Black
126505-CHOC Compatible 20mm 40mm Rose Gold Chocolate
126500LN-WH Compatible 20mm 40mm Steel White
126500LN Compatible 20mm 40mm 904L stainless steel White
6234 Compatible 20mm 40mm 904L stainless steel Silver
6234 Compatible 20mm 40mm 904L stainless steel Black
6234 Compatible 20mm 40mm 904L stainless steel Cream
6238 Compatible 20mm 40mm 904L stainless steel Silver
6238 Compatible 20mm 40mm 904L stainless steel Black
Smartlet compatibility

The Rolex Cosmograph Daytona uses 19mm and 20mm lug widths depending on reference. Smartlet attaches via the standard spring-bar system. Zero contact with the watch case, lugs, or crystal. Fully reversible in seconds.

Compatible smartwatches

Smartwatches to pair with your Rolex Cosmograph Daytona

All smartwatches below can be worn simultaneously with your Rolex Cosmograph Daytona via Smartlet.

View all compatible smartwatches →
Questions

Frequently asked

Does Smartlet work with the Rolex Cosmograph Daytona?+

Yes. The Rolex Cosmograph Daytona uses a 19mm / 20mm lug width and is fully compatible with Smartlet. Smartlet replaces the standard strap via the spring-bar system and positions your smartwatch on the same wrist. The Rolex Cosmograph Daytona requires no modification, no drilling, and no adhesive. The setup is fully reversible in seconds and your Rolex can be worn independently at any time by reinstalling its original strap.

Will Smartlet scratch or damage my Rolex Cosmograph Daytona?+

No. Smartlet makes no contact with the Rolex Cosmograph Daytona case, bezel, or crystal. It replaces the strap only, using the existing spring-bar slots. The module is manufactured in 316L stainless steel or titanium with polished and brushed finishing, and all contact points are non-abrasive. Your Rolex Cosmograph Daytona is protected throughout. The system is fully reversible and leaves no trace.

Which smartwatches can I wear with my Rolex Cosmograph Daytona?+

Smartlet is compatible with Apple Watch (all series), Samsung Galaxy Watch (4, 5, 6, 7), Garmin Fenix (6, 7, 8), Garmin Forerunner, Garmin Venu, Google Pixel Watch, Polar Vantage, Fitbit Charge, Huawei Watch GT, Withings ScanWatch, Coros, Suunto, and Whoop. The Rolex Cosmograph Daytona with its 19mm / 20mm lug width is compatible with the full Smartlet range. All smartwatch sensors remain operational when worn via Smartlet.

Where can I buy Smartlet for the Rolex Cosmograph Daytona?+

Smartlet is available directly at smartlet.io in three finishes: Classic (316L stainless steel), Shadow (PVD black-coated 316L), and Titanium. All three finishes are compatible with the Rolex Cosmograph Daytona and work with its 19mm / 20mm lug width. Orders ship internationally from Europe. No additional accessory is required for standard lug widths between 18mm and 24mm.