Rolex
Datejust 31 178288-0054— lug 16mm

The Rolex Datejust 31 ref. 178288-0054 features a lug width of 16mm. This is a non-standard size compared to the most common calibres, requiring straps specifically manufactured for this diameter, with curved ends to correctly follow the lower profile of the 18-carat yellow gold case.

For the Datejust 31 in yellow gold, a vegetable-tanned alligator strap with a glossy finish is the most coherent choice given the formal and precious character of the case. Shell cordovan is an equally compelling alternative, offering a mirror-like surface and compact structure. For everyday wear, a smooth grain calf leather strap is a balanced option that develops a beautiful patina over time.

Strap replacement requires a dedicated springbar tool — a fork-shaped instrument that compresses the spring bars housed within the lugs. On the Datejust 31, the lugs are narrow (16mm) and require a small-tipped springbar tool. It is advisable to work on a soft watch mat to avoid scratching the gold case. If in doubt, consult a watchmaker or visit the Casati Milano atelier.

Yes, high-quality aftermarket straps compatible with the Rolex Datejust 31 178288-0054 are available. It is essential to select 16mm straps with curved ends, suited to the geometry of this model's lugs. Milano Straps offers a curated selection of handcrafted 16mm straps in various materials — alligator, calf leather, shell cordovan, and NATO — designed to fit this specific lug profile precisely.

The lifespan of a leather strap depends on the quality of the tanning process, frequency of use, and level of care. A handcrafted vegetable-tanned alligator strap, worn in rotation with other straps, can last between 3 and 7 years while maintaining structural and aesthetic integrity. Prolonged contact with perspiration and water accelerates deterioration: it is recommended not to wear a leather strap during aquatic activities and to allow it to air dry thoroughly after intensive use.