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Rolex · Datejust 31

Strap for Datejust 31 Stainless Steel Diamond / Jubilee / Pink

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
Reference278384rbr-0018
FamilyDatejust 31
MovementRolex caliber 2236 Hours, Minutes, Seconds | Date | Chronometer
CaseWhite Gold, Stainless Steel

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 278384rbr-0018

Selected for the 16 mm lug width

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The Datejust 31 278384rbr-0018, seen from the bench

The Rolex Datejust 31 ref. 278384rbr-0018 features a 31mm case in 18K white gold and Oystersteel with a diamond-set bezel. Powered by the COSC-certified Rolex 2236 calibre, it offers hours, minutes, central seconds, and date functions with a 100-meter water resistance. The 16mm lug width requires precise strap selection to ensure proper fit and aesthetic continuity.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 278384rbr-0018?

The lug width of the Rolex Datejust 31 ref. 278384rbr-0018 is 16mm. This measurement refers to the internal distance between the case lugs at the strap attachment point. It is advisable to verify this measurement with a digital calliper before purchasing a replacement strap to ensure a precise fit.

What is the best strap for the Rolex Datejust 31 278384rbr-0018?

For the Datejust 31 278384rbr-0018, featuring a white gold and steel case with a diamond-set bezel, an alligator strap with vegetable tanning is the most aesthetically coherent choice. The natural belly texture develops a patina over time and complements the diamond bezel without competing with it. Smooth calf leather in neutral tones or shell cordovan are excellent alternatives for everyday wear.

How do you change the strap on a Rolex Datejust 31?

Replacing the strap on a Rolex Datejust 31 requires removing the spring bars connecting the strap to the case lugs. A forked springbar tool must be inserted into the side slot of each lug. The process demands care to avoid scratching the polished or satin-finished lug surfaces. If you are not experienced with strap changes, it is advisable to consult a watchmaker or visit the Casati Milano atelier.

Are there aftermarket straps compatible with the Rolex Datejust 31 278384rbr-0018?

Yes, high-quality aftermarket straps are available for the Rolex Datejust 31 278384rbr-0018, manufactured specifically for the 16mm lug width. Milano Straps offers a curated selection of handcrafted straps in various leathers and materials, produced with ±0.1mm lug tolerances to ensure a precise, play-free fit. Each strap is available with a steel or white gold PVD buckle or deployant clasp.

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

The lifespan of a leather strap depends on material quality, tanning method, and daily use. A top-grade vegetable-tanned alligator strap, properly maintained with conditioning cream and rotated with other straps, can last between three and seven years while retaining an excellent appearance. Prolonged exposure to perspiration, water, and direct sunlight will significantly shorten strap life. Milano Straps provides an 18-month warranty against manufacturing defects on all Casati Milano straps.

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