Rolex · Datejust 31

Strap for Datejust 31 Rose Gold / Diamond / Rose / President

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

Lug width16 mm
Case diameter31 mm
Reference278285rbr-0018
FamilyDatejust 31
MovementRolex caliber 2236 Hours, Minutes, Seconds | Date | Chronometer
CaseRose Gold

Spring bar

Spring bars for Rolex

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

Straps for the Datejust 31 278285rbr-0018

Selected for the 16 mm lug width

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The Datejust 31 278285rbr-0018, seen from the bench

The Datejust 31 represents the female version of the Rolex Datejust collection, characterized by a 31mm diameter case. It mounts the automatic caliber 2236 with chronometer certification, equipped with hour, minute, second and date indication. The lugs measure 16mm in width for strap accommodation.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 278285rbr-0018?

The lug width of the Rolex Datejust 31 278285rbr-0018 is 16mm. This dimension is the correct reference for strap replacement and determines the width of the space between the lugs of the 31mm case. The measurement is calculated as the internal distance between the upper and lower attachment points of the case.

Which strap material is most suitable for the Rolex Datejust 31 in Everose gold?

For a Datejust 31 in Everose, alligator leather is the classical choice: its semi-fine grain complements the warmth of rose gold beautifully. Vegetable-tanned calf leather is equally excellent for those seeking a finer texture and extraordinary durability. Shell cordovan offers a natural lustre without requiring polishing, whilst woven NATO fabric or vulcanised rubber are ideal for those wishing to emphasise the watch's understated sporting versatility.

How is the strap changed on a Rolex Datejust 31?

Rolex strap replacement is accomplished by removing the spring bars using a specialised knife-shaped tool. This is a delicate operation requiring precision to avoid scratching the case. We recommend having this performed by a qualified watchmaker or choosing a bespoke service such as Casati Milano, where the process is handled by experienced artisans.

Is a generic aftermarket strap compatible with the 16mm Datejust 31?

Yes, any strap with a 16mm lug width is technically compatible. However, aesthetic and quality compatibility depends upon the choice of materials and craftsmanship. An artisanally-crafted strap in alligator or vegetable-tanned calf, carefully constructed to suit the Datejust 31's proportions, ensures a finished result that honours the value and elegance of the Rolex timepiece.

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

The lifespan of a natural leather strap depends upon usage intensity, UV exposure, and maintenance. On average, a quality artisanal alligator or calf strap lasts 3–5 years under moderate daily wear. Shell cordovan, thanks to its structural density, can exceed 7–10 years. Regular maintenance (gentle cleaning and conditioning) significantly extends longevity.

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