Rolex
Datejust 31 178241-0074— lug 16mm

The Rolex Datejust 31 ref. 178241-0074 has a lug width of 16mm. This measurement refers to the internal distance between the lugs at the point where the strap attaches to the case. It is essential to use straps specifically designed for a 16mm lug width to ensure a correct fit and a clean aesthetic result.

For the Datejust 31 in Rolesor Everose, an alligator strap with vegetable tanning is the most coherent choice given the timepiece's positioning. The natural belly grain of alligator leather pairs exceptionally well with the fluted bezel. Alternatively, shell cordovan offers a smooth, burnished surface that develops a distinctive patina over time. For sporting use, a vulcanised rubber strap in 16mm is the most practical solution.

To replace the strap on a Rolex Datejust 31, a double-tipped spring bar tool is required. By positioning the tool in the spring bar seat inside the lug, the spring is compressed and the strap can be released. It is advisable to work on a soft surface to avoid scratching the case. For a professional strap change without risk of lug damage, the Casati Milano atelier offers this service by appointment.

Yes, aftermarket straps with a 16mm lug width are fully compatible with the Rolex Datejust 31 ref. 178241-0074, provided they use standard 16mm spring bars. Milano Straps offers a wide selection of 16mm straps in various materials — leather, rubber, and NATO — all handcrafted to match the dimensional specifications of this model.

The lifespan of a leather strap depends on the material, tanning quality, and daily usage. A high-quality vegetable-tanned alligator strap, with proper care — periodic conditioning and protection from prolonged moisture — can last between 3 and 7 years. Shell cordovan, owing to its exceptional fibre density, often exceeds 5 years while retaining its structural integrity. Milano Straps backs all its straps with an 18-month warranty against manufacturing defects.