Rolex · Datejust 31

Strap for Datejust 31 Rolesor Everose Fluted / Oyster / 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
Reference178271-0038
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 178271-0038

Selected for the 16 mm lug width

All 16 mm straps →

The Datejust 31 178271-0038, seen from the bench

The Datejust 31 reference 178271-0038 features the automatic Rolex caliber 2235 with chronometer certification. It presents hour, minute, second and date functions with a 31mm case. The lugs measure 16mm in width.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 178271-0038?

The lug width of the Rolex Datejust 31 178271-0038 is 16 millimetres. This measurement is specific to the 31 mm Datejust models and represents the distance between the lugs of the case where the strap is attached. It is essential to verify this dimension before purchasing an aftermarket strap to ensure correct fit and preserve the watch's aesthetic integrity.

What is the best strap for the Rolex Datejust 31 178271-0038?

The ideal strap depends on intended use and personal preference. For formal occasions, black or dark brown alligator creates sophisticated elegance that enhances the rose gold. Shell cordovan in cognac tones offers natural patina that develops richly over time. For contemporary looks, full-grain vegetable-tanned calf in burgundy or navy provides modern character. Structured rubber offers practicality for sports contexts. All our 16 mm straps are available online, with personalised consultation available at Casati Milano.

How do I change the strap on a Rolex Datejust 31 178271-0038?

Strap replacement requires a specific tool (spring bar tool) to compress the spring bars located at the case ends. Carefully insert the tool into the small lateral slots to release the old strap, then align the new strap's lugs with the case attachments. Avoid forcing to prevent damage to the delicate case lugs. If uncertain, we recommend having the operation performed by a professional.

Can I use an aftermarket compatible strap on my Datejust 31 178271-0038?

Yes, provided the strap is specifically manufactured for the 16 mm lug width. Artisanal aftermarket straps offer superior aesthetic freedom and material quality compared to factory Rolex straps. We recommend working with specialised manufacturers who guarantee dimensional precision, premium materials (alligator, shell cordovan, vegetable-tanned calf) and professional finishing. Casati Milano offers personalised consultation and bespoke appointment service for material and colour selection.

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

Leather strap durability varies according to material type and usage intensity. Alligator and shell cordovan, with proper maintenance (protection from excess moisture, periodic cleaning), last 3-5 years with daily wear. Full-grain calf requires greater care and typically lasts 2-3 years. Structured rubber offers greater resilience, lasting 4-6 years. Proper storage (avoiding prolonged direct sunlight, protecting from humidity) and regular maintenance significantly extend strap lifespan. Casati Milano provides an 18-month warranty against manufacturing defects.

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