Rolex
Datejust 31 178275f-0034— lug 16mm

The lug width of the Rolex Datejust 31 ref. 178275f-0034 is 16mm. This measurement refers to the internal distance between the case lugs at the point where the strap attaches, and it is the critical parameter to verify before purchasing any aftermarket strap.

For a Datejust 31 in Everose gold, a vegetable-tanned alligator strap is the most aesthetically coherent choice: the natural scale grain complements the precious case finishes. Shades of bordeaux, cognac, and mahogany pair best with the warm chromatic temperature of Everose gold. Alternatively, shell cordovan in whisky or bordeaux offers an exceptionally refined mirror-like surface.

To replace the strap on a Datejust 31, the two spring bars securing the strap to the case lugs must be removed. This requires a fine-tipped spring bar tool to avoid scratching the Everose gold lugs. It is advisable to entrust this operation to a watchmaker or specialist atelier to preserve the case finish.

Yes. Aftermarket straps with a 16mm lug width are compatible with the Rolex Datejust 31 ref. 178275f-0034. Milano Straps offers a curated selection of handcrafted straps in alligator, calf leather, shell cordovan, and rubber, specifically made for the 16mm format, with bespoke customisation available through Casati Milano atelier.

The lifespan of a leather strap depends on the quality of the raw material, the tanning process, and daily use. A high-grade vegetable-tanned alligator strap, with proper care — periodic cleaning and protection from water and perspiration — can last between 3 and 7 years while retaining its structural and aesthetic integrity. Shell cordovan, owing to the density of its fibres, tends to last even longer, developing a distinguished patina over time.