Rolex
Datejust 31 178159-0065— lug 16mm

The lug width of the Rolex Datejust 31 reference 178159-0065 is 16mm. This measurement is taken with a digital calliper positioned inside the lugs, at the point of contact with the strap. It is the essential parameter for identifying any compatible aftermarket strap.

For a white gold case such as that of the Datejust 31 178159-0065, a glossy alligator strap is the most coherent aesthetic choice: the regular grain and natural lustre of the leather complement the precious metal. Alternatively, a vegetable-tanned calf leather or shell cordovan strap offers restraint and noble ageing. A white gold deployant clasp completes the pairing with precise metallic consistency.

To replace the strap on a Rolex Datejust 31, you will need a double-ended spring bar tool. Insert the fine tip into the lateral groove of the lug, compress the spring bar and slide the strap free. The operation should be carried out carefully to avoid scratching the white gold case. It is advisable to work on a microfibre surface or consult a watchmaker.

Yes. The Rolex Datejust 31 178159-0065 uses standard 16mm spring bars, compatible with any high-quality aftermarket strap with a 16mm lug width. Milano Straps offers a curated selection of artisan straps in various leathers and finishes, crafted specifically for this lug size, with a bespoke option through the Casati Milano atelier.

The lifespan of a leather strap depends on the material and care taken. A quality alligator strap worn daily will typically last 2–4 years before showing significant wear. Vegetable-tanned calf leather develops a noble patina but is more sensitive to moisture. Shell cordovan is the most resistant to deformation. Rotating between two or three straps significantly extends the life of each one.