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Rolex · Datejust 31

Strap for Datejust 31 Rose Gold / Diamond / MOP / Oyster

Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

16mm
16 mm strapsAll Rolex
Lug width16 mm
Case diameter31 mm
Reference278285rbr-0011
FamilyDatejust 31
MovementRolex caliber 2236 hours, minutes, seconds | date | chronometer
Year2019
CaseRose Gold

Spring bar

Spring bars for Rolex

The right category for this model · choose the 16 mm size

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Straps for the Datejust 31 278285rbr-0011

Selected for the 16 mm lug width

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The Datejust 31 278285rbr-0011, seen from the bench

The Rolex Datejust 31 (ref. 278285rbr-0011) features a 31mm Everose gold case with diamond-set bezel and mother-of-pearl dial. Powered by the Rolex calibre 2236 Manufacture movement with COSC chronometer certification and silicon Syloxi hairspring, it delivers ±2 seconds per day accuracy and automatic winding via the Perpetual rotor. Water-resistant to 100 metres with Twinlock crown, it includes the iconic Cyclops lens at 3 o'clock. The lug width is 16mm. This timepiece combines precious metal aesthetics with technical precision.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 278285rbr-0011?

The Rolex Datejust 31 reference 278285rbr-0011 has a lug width of 16mm. This measurement, characteristic of the 31mm ladies' versions within the Datejust family, determines aftermarket strap compatibility and should always be confirmed with a calliper before purchasing a replacement strap.

What is the best strap for the Rolex Datejust 31 278285rbr-0011?

For the Datejust 31 in Everose gold, polished wide-grain alligator is the canonical choice, complementing the pavé-set bezel with refined restraint. Vegetable-tanned calf develops a distinctive patina over time, whilst shell cordovan offers unmatched density and chromatic depth. All options are available in the 16mm lug width from Milano Straps and Casati Milano atelier.

How do you change the strap on a Rolex Datejust 31 278285rbr-0011?

Strap replacement requires a spring bar tool to release the 16mm spring bars from the lugs. Care should be taken to protect the Everose gold case from scratching during the operation. The task is manageable for an experienced enthusiast; alternatively, Casati Milano offers in-atelier fitting by appointment in Milan.

Are there aftermarket straps compatible with the Rolex Datejust 31 278285rbr-0011?

Yes. Milano Straps offers handcrafted straps specifically sized for the 16mm lug width of the Datejust 31 278285rbr-0011. The narrower aftermarket segment for 16mm tends to favour higher-quality producers, making the available selection particularly well-suited to the standard of this timepiece.

How long does a leather strap last on a Rolex Datejust 31?

A quality alligator strap, kept away from prolonged moisture exposure and properly maintained, will typically last between three and five years of daily wear. Shell cordovan and premium vegetable-tanned leathers can exceed this range, developing a sought-after patina. Casati Milano backs its straps with an 18-month manufacturing warranty.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only