Rolex · Datejust 31
Strap for Datejust 31 Rose Gold / Fluted / White - Roman / Oyster
Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Datejust 31 278275-0018
Selected for the 16 mm lug width
The Datejust 31 278275-0018, seen from the bench
Frequently asked questions
What is the lug width of the Rolex Datejust 31 278275-0018?
The lug width of the Rolex Datejust 31 278275-0018 is 16 millimetres. This non-standard measurement is specifically calibrated for the proportions of the 31 millimetre case, ensuring visual balance and mechanical solidity at the case-strap interface. Verify by measuring the internal space between the two attachment pins.
Which strap is best suited to the Datejust 31 278275-0018 in Everose gold?
For the Datejust 31 in Everose gold, we recommend alligator straps in dark brown, shell cordovan in black with vegetable tanning, or calf leather with vegetable tanning in burgundy. Alligator offers maximum refinement, shell cordovan develops a unique patina over time, while calf leather ensures versatile daily wear. All must feature 16 millimetre lug width and an integrated deployante buckle.
How do you change the strap on a Rolex Datejust 31?
To change the strap, use a small-diameter punch pin to gently push the attachment pin from the sides of the case. Extract the pin completely, then disconnect the strap from the first lug. Repeat for the other lug, position the new strap and reinsert the pins from top to bottom until fully seated. Verify that the pin does not protrude laterally.
Can I use an aftermarket strap with 16mm lug width on my Datejust 31 278275-0018?
Yes, provided the strap is specifically constructed with 16 millimetre lug width and compatible with Rolex pins. Consult specialist manufacturers such as Casati Milano to ensure precise manufacturing tolerances, material quality (alligator, shell cordovan, vegetable-tanned leather) and finishing appropriate to the dignity of the watch.
How long does a leather strap last on a Rolex Datejust 31?
A quality artisanal leather strap (alligator, shell cordovan or vegetable-tanned calf) typically lasts 3-5 years with daily wear, developing a characteristic patina over time. Durability depends on frequency of use, climate, periodic care and tanning quality. Casati Milano offers 18 months' warranty on manufacturing defects and support for extraordinary maintenance.
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

