Rolex · Datejust 31

Strap for Datejust 31 Yellow Gold Domed / Oyster / Silver

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
Reference178248-0020
FamilyDatejust 31
MovementRolex caliber 2235 hours, minutes, seconds | date | chronometer
CaseYellow Gold

Spring bar

Spring bars for Rolex

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

Straps for the Datejust 31 178248-0020

Selected for the 16 mm lug width

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The Datejust 31 178248-0020, seen from the bench

The Datejust 31 represents the female version of the Rolex Datejust collection, characterized by the 31mm diameter case. It is equipped with the automatic caliber 2235 with official chronometer certification and date complication at 3 o'clock. The lugs measure 16mm in width to accommodate the strap.

Frequently asked questions

What is the exact lug width of the Rolex Datejust 31 178248-0020?

The lug width of the Rolex Datejust 31 178248-0020 is 16 millimetres. This measurement represents the distance between the two horizontal attachment pins on the case and is critical when selecting a compatible strap. Even a minor deviation would result in poorly fitting attachment points, compromising comfort and security during wear.

Which strap material is most suitable for the Datejust 31 178248-0020?

For the Datejust 31 178248-0020 in yellow gold, alligator remains the most sophisticated choice: natural scales integrate seamlessly with the gold's patina development, creating visual coherence over time. Vegetable-tanned leather offers refinement and versatility. Shell cordovan represents the enthusiast's choice for exceptional durability (beyond 15 years of daily wear) and unique character. Rubber and NATO fabric are sportive alternatives but less appropriate for formal contexts.

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

Strap replacement requires a specialist tool (spring bar tool) and careful technique. Position the watch with the strap facing downward, insert the tool's tip into the small aperture beneath the lug, apply calibrated pressure to release the elastic pin, then extract the lug from the case. The reverse procedure installs the new strap. Perform this operation on a padded surface to avoid case scratches.

Is Milano Straps aftermarket strap truly compatible with the 178248-0020?

Yes, Milano Straps 16mm straps are fully compatible with the Datejust 31 178248-0020. Every strap is precision-modelled with millimetric accuracy on the attachment points to ensure absence of lateral play and ergonomic comfort. The pins employed are compatible with Rolex systems and fitting requires no adjustments.

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

Durability varies by material and usage intensity. Alligator, when properly maintained, lasts 8-12 years with daily wear. Vegetable-tanned calf achieves 6-10 years. Shell cordovan, owing to its exceptional fibre density, exceeds 15 years. Natural ageing of leather is desirable: the patina that develops enhances the watch's character. Milano Straps guarantees 18 months against manufacturing defects on every strap.

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