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Rolex · Datejust 31

Strap for Datejust 31 Stainless Steel Fluted / Oyster / Dark Rhodium Floral

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
Reference178274-0091
FamilyDatejust 31
MovementRolex caliber 2235 Hours, Minutes, Seconds | Date | Chronometer
CaseWhite Gold, Stainless Steel

Spring bar

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

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Straps for the Datejust 31 178274-0091

Selected for the 16 mm lug width

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The Datejust 31 178274-0091, seen from the bench

The Rolex Datejust 31 ref. 178274-0091 is a timepiece with its own proportions, not a scaled version of the men's caliber. The 31mm stainless steel Oystersteel and 18-carat white gold case pairs with a diamond-set dial and fluted white gold bezel. The automatic Rolex 2235 movement is COSC chronometer certified and powers hours, minutes, seconds, and date at 3 o'clock. The Oyster case is water-resistant to 100 meters. The lug width is 16mm, distinct from the 20mm of men's Datejust models and 13mm of some women's versions.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 ref. 178274-0091?

The Rolex Datejust 31 ref. 178274-0091 has a lug width of 16mm. This measurement is specific to this 31mm case size and should be verified with a digital calliper before purchasing any aftermarket strap.

What is the best strap for the Rolex Datejust 31 178274-0091?

For a white gold and steel case with a fluted bezel, fine-grain alligator belly leather is the most formally coherent choice. Alternatively, vegetable-tanned box-calf leather develops a distinctive patina over time. The recommended clasp is a butterfly deployant in steel or white gold, 16mm.

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

Strap replacement requires a fine-tipped springbar tool suited to Rolex lugs. The Datejust 31's 16mm lug profile demands a precise tool to avoid scratching the white gold case. It is advisable to have the strap changed by a watchmaker or a specialist atelier.

Are there aftermarket straps compatible with the Rolex Datejust 31 ref. 178274-0091?

Yes. Any aftermarket strap with a 16mm attachment is technically compatible. Milano Straps offers a curated selection of handcrafted leather, rubber and exotic leather straps made specifically for 16mm lugs, with buckles and deployants in steel or gold finishes.

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

Longevity depends on the material and care. A quality alligator strap, conditioned periodically with a neutral cream and kept away from direct moisture, will last between 3 and 5 years with daily wear. Vegetable-tanned box-calf can last even longer, developing a characteristic patina. Milano Straps products carry an 18-month guarantee 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