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Rolex · Datejust 31

Strap for Datejust 31 Stainless Steel Fluted / Oyster / Silver Computer

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
Reference178274-0029
FamilyDatejust 31
MovementRolex caliber 2235 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 178274-0029

Selected for the 16 mm lug width

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The Datejust 31 178274-0029, seen from the bench

The Rolex Datejust 31 ref. 178274-0029 belongs to one of the most enduring and recognizable lines from the Geneva manufacture, established in 1945. This 31 mm version occupies the mid-range of the family, designed for proportional elegance on smaller wrists. The case combines stainless steel 904L and white gold with a fluted bezel, delivering formal versatility. It houses the Rolex Calibre 2235, an automatic movement with paramagnetic balance wheel, officially chronometer-certified with ±2 seconds per day accuracy. Case diameter is 31.00 mm; lug width measures 16 mm exactly, a critical specification for strap replacement compatibility.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 ref. 178274-0029?

The Rolex Datejust 31 ref. 178274-0029 has a lug width of 16 mm. This measurement must be taken internally between the two lugs at the strap attachment point. Respecting this dimension is essential to ensure correct fitment and aesthetically proportionate wear.

What is the best strap for the Rolex Datejust 31 178274-0029?

For the Datejust 31 in steel and white gold, an alligator strap with vegetable tanning is the most coherent choice for the model's formal register. Alternatively, smooth calfskin or shell cordovan offer more understated yet equally refined options. For casual or summer use, a nylon NATO or vulcanised rubber strap provides comfort and water resistance.

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

To replace the strap on a Rolex Datejust 31, the spring bars connecting the strap to the case must be removed using a dedicated spring bar tool or a soft-tipped flat lever to avoid scratching the lugs. It is advisable to perform the operation on a soft cloth and, if in doubt, to consult a watchmaker or the Casati Milano atelier.

Are there aftermarket straps compatible with the Rolex Datejust 31 178274-0029?

Yes, there are numerous high-quality aftermarket options compatible with the Datejust 31. The fundamental requirement is a lug width of 16 mm. Milanostraps.it offers a selection of handcrafted straps in premium leathers, available both as bespoke commissions and ready-to-ship pieces, specifically sized for this measurement.

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

The lifespan of a leather strap depends on the quality of the tanning, daily usage and maintenance. A quality vegetable-tanned alligator strap, worn in rotation and stored away from moisture and perspiration, can last between 3 and 7 years while maintaining its structure and patina. Shell cordovan, due to its dense fibre structure, tends to offer greater longevity than standard calfskin.

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