Rolex
Datejust 31 178279-0075— lug 16mm

The lug width of the Rolex Datejust 31 reference 178279-0075 is 16 mm. This is a non-standard measurement compared to more common sizes such as 18 or 20 mm, which means straps must be specifically manufactured for this dimension to ensure a precise fit with no lateral play.

For a 31 mm white gold case, belly-cut alligator leather with a glazed finish is the most aesthetically coherent choice, as the symmetrical grain and natural sheen complement the precious metal. Alternatively, vegetable-tanned calf leather or shell cordovan offer a more everyday register with excellent longevity. A deployant clasp is recommended to preserve the strap's geometry on a narrow 16 mm lug width.

To replace the strap on the Rolex Datejust 31, a spring bar tool is required to remove the spring bars securing the strap to the case lugs. The process should be carried out carefully to avoid scratching the white gold case. It is advisable to entrust this operation to a watchmaker or specialist atelier, particularly when fitting non-standard aftermarket straps at 16 mm.

Yes, high-quality aftermarket straps compatible with the Rolex Datejust 31 178279-0075 are available, produced specifically for the 16 mm lug width. Milano Straps offers a curated selection of handcrafted straps in various materials — alligator, calf leather, shell cordovan and rubber — available bespoke or ready to order online, designed to fit the lugs of this model without any case modification.

The lifespan of a leather strap depends on the material, frequency of use and conditions of wear. A quality alligator strap, with proper care, can last between three and five years with regular use. Vegetable-tanned calf leather develops a patina over time but is more susceptible to moisture. Shell cordovan, owing to its dense and compact structure, generally offers the greatest resistance to deformation. Milano Straps provides an 18-month warranty against manufacturing defects on all its straps.