Rolex · Datejust 31

Strap for Datejust 31 Rolesor Everose Fluted / Jubilee / Pink Computer

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
Reference178271-0012
FamilyDatejust 31
MovementRolex caliber 2235 hours, minutes, seconds | date | chronometer
CaseRose Gold, Stainless Steel

Spring bar

Spring bars for Rolex

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

Straps for the Datejust 31 178271-0012

Selected for the 16 mm lug width

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The Datejust 31 178271-0012, seen from the bench

The Datejust 31 reference 178271-0012 mounts the automatic caliber 2235 with chronometer certification and date indication. The 31mm case features 16mm lugs and offers hour, minute, second and date functions. The movement guarantees chronometric precision according to COSC standards.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 178271-0012?

The lug width (spring bar distance) of the Rolex Datejust 31 reference 178271-0012 is exactly 16 millimetres. This measurement is specific to the 31-millimetre Datejust family and is calculated by Rolex to maintain perfect visual proportions between the case and strap. It is not interchangeable with other lug widths.

What is the best strap for the Rolex Datejust 31 178271-0012?

The ideal choice depends on your personal aesthetic preference. For classical elegance, we recommend alligator leather in brown or tobacco tones, which dialogues naturally with the rose gold Everose. For versatility and long-term visual appeal, shell cordovan in deep burgundy develops a captivating patina over time. Smooth calf leather excels in everyday comfort, whilst NATO straps offer dynamic versatility. Your primary use case should guide your selection.

How do I change the strap on my Rolex Datejust 31 178271-0012?

Strap replacement requires a spring bar tool. Position yourself on a clean, stable surface and locate the small holes beneath each lug. Insert the flat end of the spring bar tool into the hole to compress the internal spring, then slide the old strap upward. Repeat on the opposite lug. Insert the new strap by pushing the spring until it clicks into position. We recommend entrusting this operation to a qualified watchmaker if you lack experience.

Can I use an aftermarket compatible strap on my Rolex Datejust 31 178271-0012?

Yes, absolutely. Any strap featuring a 16-millimetre lug width is mechanically compatible. The distinction lies in construction quality, material durability and finishing refinement. Artisanal leather straps such as those from Casati Milano offer superior quality compared to the original Rolex bracelet in terms of visual patina development and aesthetic customisation potential.

How long does a leather strap last on a Rolex Datejust 31 178271-0012?

Lifespan varies according to material and usage intensity. A high-quality artisanal alligator or shell cordovan strap lasts 3–5 years under regular daily use, with potential restoration extending its life to 7–8 years if properly maintained. Smooth calf leather typically lasts 2–3 years. Leather is a living material that ages: this represents aesthetic value, not defect. With proper care — avoiding excessive moisture and using gentle cleaning — you will develop increasingly beautiful patina over time.

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