Rolex · Datejust 31

Strap for Datejust 31 Yellow Gold Fluted / Oyster / Silver Roman

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
Reference178278-0126
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 178278-0126

Selected for the 16 mm lug width

All 16 mm straps →

The Datejust 31 178278-0126, seen from the bench

The Rolex Datejust 31 ref. 178278-0126 in 18-carat yellow gold combines watchmaking tradition with contemporary design. The 31mm yellow gold case houses the Rolex caliber 2235, a third-generation movement certified as COSC Chronometer and meeting Rolex Superlative standards (±2 seconds/day). Functions include hours, minutes, seconds and instant date change. The 16mm lug width is the native specification for this model, requiring precise measurement for compatible aftermarket straps.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 reference 178278-0126?

The Rolex Datejust 31 ref. 178278-0126 features a native lug width of 16mm. This measurement corresponds to the internal distance between the two lugs at the point where the strap attaches to the case. Precise adherence to this dimension is essential to ensure correct fitment and aesthetic alignment with the yellow gold case.

What is the best strap for the Rolex Datejust 31 178278-0126 in yellow gold?

For the 18-carat yellow gold case of the Datejust 31, an alligator belly strap in dark tobacco brown or gloss black offers the finest balance between material prestige and aesthetic harmony. Shell cordovan is a compelling alternative for those who favour a more lived-in, evolving patina. In either case, a yellow gold deployant clasp is recommended for constructive and visual coherence.

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 lugs must be removed. Using a fine-tipped springbar tool inserted into the lug slot, compress each spring bar inward to release it. Given the value of the yellow gold case, it is strongly advised to work on a soft surface and to use a tool with a coated tip to prevent scratching the lugs.

Are there aftermarket straps compatible with the Rolex Datejust 31 178278-0126?

Yes, high-quality aftermarket straps are available for the Datejust 31 ref. 178278-0126. The key requirement is a 16mm lug width with curved ends to match the profile of Rolex lugs. Milanostraps.it offers a curated selection of handcrafted straps in various materials made specifically for this lug opening, with finishes in keeping with the aesthetics of a yellow gold case.

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

The lifespan of a leather strap depends on the quality of the hide, frequency of wear, and daily care. A high-grade alligator or shell cordovan strap, when rotated regularly with other straps and kept away from prolonged exposure to perspiration and water, retains its structural and aesthetic integrity for 3 to 5 years. Milanostraps.it provides an 18-month guarantee against manufacturing defects on all its straps.

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.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only