Rolex
Datejust 31 278275-0016— lug 16mm

The Rolex Datejust 31 reference 278275-0016 has a lug width of 16mm. This is the internal measurement between the case lugs and is the defining parameter for selecting a compatible strap. Rolex factory spring bars have a diameter of 1.5mm.

For a Datejust 31 in Everose gold, an alligator strap with vegetable tanning is the most aesthetically coherent high-quality option. Curved-end tips ensure a seamless fit against the case. Shell cordovan is an equally refined alternative, offering a finer profile at the lug and a patina that improves with wear. Both options are available at milanostraps.it in 16mm.

To replace the strap on the Datejust 31, use a spring bar tool or a flat-head screwdriver to release the spring bars from the lugs. Rolex uses 1.5mm diameter spring bars. Always work on a soft surface to protect the case and bezel, and avoid direct metal-on-metal contact to prevent scratching the lugs.

Yes. Any strap with a 16mm attachment width and, ideally, curved ends is technically compatible with the Datejust 31. Milano Straps offers a curated selection of artisan leather, nylon and rubber straps specifically sized for 16mm lugs, with a bespoke customisation option available at the Casati Milano atelier.

The lifespan of a leather strap depends on tanning quality, daily use and maintenance. A vegetable-tanned alligator strap used with care, alternated with other straps, can last between 3 and 5 years while developing a distinguished patina. Prolonged exposure to perspiration, water and perfume accelerates deterioration. Milano Straps provides an 18-month warranty against manufacturing defects.