Rolex
Datejust 31 178158-0062— lug 16mm

The Rolex Datejust 31 ref. 178158-0062 has a lug width of 16mm. This measurement is specific to the 31mm variant and differs from the 18mm of the Datejust 36 and the 20mm of the Datejust 41. Always verify the lug width with a digital calliper measuring the internal gap between the lugs before purchasing an aftermarket strap.

For the yellow gold case of the Datejust 31 178158-0062, the most suitable materials are alligator leather (glossy black or matte cognac) and shell cordovan in burgundy or tobacco. Both complement the warm chromatic tone of yellow gold without competing with the case. Vegetable-tanned calf leather is a versatile alternative for less formal settings. A yellow gold PVD deployant clasp completes the pairing with visual consistency.

To replace the strap on a Datejust 31, you will need a fine-tipped spring bar tool. Insert the tip into the lug slot, compress the spring bar and release the strap. Take care not to scratch the yellow gold lugs — it is advisable to protect the case with masking tape beforehand. With the 16mm spring bars already fitted to the new strap, reinstallation is straightforward.

Yes. The Rolex Datejust 31 ref. 178158-0062 accepts any aftermarket strap with a 16mm lug width and standard 1.5mm spring bars. Milano Straps and Casati Milano handcrafted straps are manufactured to this measurement with ±0.2mm tolerances, ensuring a precise fit without placing stress on the yellow gold lugs. Avoid straps with rigid, unshaped ends that may not conform to the case curvature.

The lifespan of a leather strap on a Rolex Datejust 31 depends on the material and usage conditions. A high-quality alligator strap, with moderate daily wear and proper care (avoiding prolonged exposure to water and perspiration, rotating with a second strap), typically lasts 3 to 5 years before requiring replacement. Shell cordovan is notably more abrasion-resistant and can exceed 5 years. Casati Milano straps carry an 18-month guarantee against manufacturing defects.