Rolex
Datejust 31 178271-0017— lug 16mm

The Rolex Datejust 31 reference 178271-0017 has a lug width of 16mm. This measurement should be taken with a digital calliper placed inside the lugs at the point where the strap attaches to the case, as measuring externally across the Oyster lugs can yield inaccurate readings due to their curved profile.

For the 178271-0017 in Rolesor Everose, an alligator strap with vegetable tanning in burgundy or deep navy is the most aesthetically coherent choice: the belly grain complements the Everose gold bezel without overpowering it. For daily wear, box-calf leather or shell cordovan offer superior durability and shape retention over time.

To replace the strap on a Datejust 31, use a dedicated springbar tool or a fine-tipped screwdriver. Rolex Oyster lugs use standard 1.8mm diameter spring bars. Work on a soft surface to protect the steel case and Everose gold bezel from accidental scratches. If in doubt, the operation can be carried out by a watchmaker or specialist atelier.

Yes. The 16mm lug width is produced by numerous artisan workshops. Milano Straps offers bespoke aftermarket straps in alligator, calf leather, shell cordovan and rubber specifically sized for the 16mm lug width of the Datejust 31. Deployant clasps or pin buckles can be finished in steel or rose gold to match the case.

Longevity depends on the material and frequency of use. A quality vegetable-tanned alligator strap typically lasts 3 to 5 years with regular wear. Shell cordovan, owing to the dense fibre structure of equine leather, can exceed 5 years while retaining its shape. Prolonged exposure to perspiration, water and UV radiation accelerates degradation; leather straps should not be worn during water activities or intense sport.