Strap for Datejust 31 Stainless Steel Diamond / Oyster / Bronze - Roman

The Rolex Datejust 31 178384-0026 features a 16mm lug width. This measurement is specific to the 31mm case size and is not shared with larger Datejust references such as the 36mm or 41mm, both of which use 20mm lugs. Always verify the lug width with a digital calliper before purchasing an aftermarket strap.

For the Datejust 31 178384-0026 with its steel case and white gold fluted bezel, the most appropriate materials are polished alligator leather for formal occasions, shell cordovan for daily wear with patina development, and vegetable-tanned calf leather for versatility. A deployant clasp in stainless steel ensures chromatic consistency with the case and improved wearing comfort.

To replace the strap on a Datejust 31, the spring bars must be removed from the 16mm lugs using a dedicated spring bar tool — either a fork-tip or a point-tip variant. Rest the case on a soft cushion to protect the bezel and crystal during the operation. Standard 16mm spring bars with shoulders are compatible with Rolex Oyster lugs on the 31mm case.

Yes, high-quality aftermarket straps specifically crafted for the 16mm lug width of the Datejust 31 are available. Milano Straps offers a curated selection of leather, alligator, shell cordovan and rubber straps with shaped ends designed to fit the geometry of the Rolex 31mm case, available online with international shipping.

The lifespan of a leather strap depends on material quality and maintenance. A quality alligator strap, regularly conditioned with appropriate leather care products and rotated with other straps, can last between 5 and 10 years while retaining structural integrity. Shell cordovan, due to its natural fibre density, offers superior wear resistance compared to standard calf leather. Casati Milano straps carry an 18-month warranty against manufacturing defects.