Strap for Datejust 31 Yellow Gold Diamond / President / Paved Roman

The Rolex Datejust 31 ref. 178158-0022 has a lug width of 16mm. This measurement should be taken with a digital calliper directly between the two lower lugs, flush against the case, to obtain an accurate reading. It is a critical specification when selecting a compatible strap to ensure there is no lateral play or forced fitting during installation.

For an 18-carat yellow gold case, a vegetable-tanned alligator strap is the canonical choice: the scale texture complements the warmth of the metal without competing with it. Shell cordovan, with its dense surface and characteristic patina that develops over time, is a compelling alternative for a more personal pairing. For everyday or active use, smooth calf leather or vulcanised rubber offer comfort and longevity. The correct width is always 16mm.

Replacing the strap on the Datejust 31 requires a fine-tipped spring bar tool, which is inserted into the lateral slots of the lugs to compress the retaining spring bars. Care must be taken: excessive pressure can scratch the yellow gold case. It is advisable to work on a soft surface and, for those unfamiliar with the procedure, to have it carried out by a watchmaker or at the Casati Milano atelier during a fitting consultation.

Yes. The Rolex Datejust 31 178158-0022 accepts any strap with a 16mm lug width and a standard 1.8mm spring bar diameter. Milano Straps offers a curated selection of handcrafted aftermarket straps in alligator, calf leather, shell cordovan and rubber, all made from premium materials and fully compatible with the original Rolex lugs. Compatibility should also be checked on the buckle side: the original Rolex deployant clasp can be reused with specific adapters.

The lifespan of a leather strap depends on the type of leather, care and frequency of use. A quality vegetable-tanned alligator strap, regularly conditioned with a neutral leather cream and protected from water and perspiration, can last between three and five years while developing an attractive patina. Shell cordovan offers superior durability due to its dense fibre structure. Milano Straps straps come with an 18-month warranty against manufacturing defects.