Rolex
Datejust 31 278248-0036— lug 16mm

The Rolex Datejust 31 ref. 278248-0036 has a lug width of 16mm, measured internally between the two case lugs. This measurement is critical when selecting any aftermarket strap and should not be confused with the 20mm lug width of the Datejust 41 or other sizes within the Datejust family.

For the Datejust 31 in yellow gold, a vegetable-tanned alligator strap with belly grain offers the greatest material coherence. Box calf with natural patina and shell cordovan are equally refined alternatives. Chromatically, jet black, cognac and bordeaux are the most effective pairings with 18-carat yellow gold.

Strap replacement on the Datejust 31 278248-0036 requires a fine-tipped springbar tool to release the springbars housed within the lugs. It is advisable to work on a soft surface to protect the yellow gold case. For aftermarket straps with narrow lugs (16mm), a springbar tool with a head of 1.2mm or less is recommended to avoid scratching the lugs.

Yes. Any strap with a lug width of 16mm is technically compatible with the Datejust 31 278248-0036. Milano Straps offers a selection of handcrafted straps in 16mm, available in alligator, calf leather, shell cordovan and rubber, with customisable stitching and finishes. The Casati Milano atelier produces fully bespoke straps tailored to the client's wrist measurement.

The lifespan of a leather strap depends on the material, the tanning process and conditions of use. A quality vegetable-tanned alligator strap, properly maintained — kept away from prolonged exposure to water and perspiration and periodically conditioned with a leather cream — will typically last 3 to 5 years with regular wear. Box calf and shell cordovan tend to develop patina over time and generally outlast chemically tanned leathers, which deteriorate more rapidly.