Rolex
Datejust 31 178341-0035— lug 16mm

The Rolex Datejust 31 ref. 178341-0035 features a lug width of 16mm. This measurement is specific to the 31mm case diameter and is consistent across the entire Datejust 31 range. When selecting an aftermarket strap, only models with a 16mm head width should be considered, ideally with curved ends to match the geometry of the Oyster lugs.

For the two-tone steel and Everose gold case of the Datejust 31 178341-0035, vegetable-tanned alligator straps in deep chocolate brown, bordeaux or cognac provide the most coherent aesthetic pairing. Shell cordovan in tan is an outstanding alternative for warm-toned ensembles. For casual wear, smooth calfskin in slate grey or matte black offers versatility and durability.

To replace the strap on a Datejust 31, a springbar tool is required to compress and remove the springbars connecting the strap to the case lugs. Insert the tool into the small recess on the lug, compress the springbar and slide the strap free. Care must be taken to avoid scratching the Everose gold lugs. It is advisable to perform this operation on a soft surface, or to entrust the task to a qualified watchmaker.

Yes, a wide range of aftermarket straps are compatible with the Rolex Datejust 31 178341-0035. The essential requirement is a 16mm lug width with curved ends to match the Oyster case geometry. Milanostraps.it offers a curated selection of handcrafted straps in alligator, calfskin and technical materials, specifically sized for this lug width, with buckles and deployant clasps in steel or rose gold.

The longevity of a leather strap depends on material quality, frequency of wear and maintenance. A high-quality vegetable-tanned alligator strap, worn with care and kept away from prolonged exposure to water and perspiration, can last between 3 and 7 years while retaining structural integrity and a dignified appearance. Calfskin straps of comparable quality have a similar lifespan but develop patina more rapidly. Straps should be allowed to dry thoroughly after intense use and should not be worn during water activities.