Strap for Datejust 31 White Gold Fluted / President / Blue

The Rolex Datejust 31 reference 178279-0041 features a 31mm case with a lug width of 16mm. This measurement refers to the internal distance between the two lugs at the spring bar attachment point. It is the critical dimension to verify before purchasing any aftermarket or replacement strap.

For the Datejust 31 in white gold, the most fitting materials are vegetable-tanned alligator — prized for its three-dimensional grain and long-term patina — and shell cordovan for those seeking a compact surface with distinctive visual depth. A tapered strap from 16mm to 14mm enhances the feminine proportions of the case. A deployant clasp extends the life of the leather strap by reducing daily stress on the lug attachment.

To replace the strap on a Datejust 31, the spring bars connecting the bracelet or strap to the case lugs must be removed. The operation requires a spring bar tool or a fine flat-blade screwdriver. Insert the tool into the lateral hole of the lug, compress the spring and slide out the bar. Care must be taken to avoid scratching the white gold case surface. If in doubt, entrust the operation to a qualified watchmaker or the Casati Milano atelier.

Yes, there are aftermarket straps made specifically for the 16mm lug width compatible with the Rolex Datejust 31. Milano Straps produces handcrafted straps in leather, alligator, shell cordovan and other materials with a 16mm attachment, available online or customisable to order at the Casati Milano atelier. Millimetre-precise construction ensures both compatibility and long-term durability.

The lifespan of a leather strap depends on the material, care, and frequency of use. A high-quality alligator or shell cordovan strap with vegetable tanning can last between 3 and 7 years if kept away from water, excessive perspiration, and direct heat sources. Using a deployant clasp significantly reduces daily stress on the lug attachment, extending the strap's service life. Milano Straps leather straps come with an 18-month warranty against manufacturing defects.