Rolex
Datejust 31 178158-0054— lug 16mm

The Rolex Datejust 31 reference 178158-0054 has a lug width of 16mm. This measurement is taken with a digital calliper across the internal distance between the two lugs at the point where the strap attaches. It is a standardised dimension across the entire Datejust 31mm family.

Given the yellow gold case of the 178158-0054, the most suitable materials are alligator belly leather in cognac or tobacco tones, vegetable-tanned calf leather, and shell cordovan in burgundy or black. All three options complement the warm chromatic register of the 18-carat yellow gold case and pair well with the calibre 2235 movement.

To replace the strap, remove the 1.5mm spring bars seated within the 16mm lugs using a fine-tipped springbar tool. Work on a soft surface to protect the gold case. Fit the new strap in reverse order, ensuring both spring bars are correctly seated before wearing the watch.

Yes. The 16mm lug width is compatible with a wide range of quality aftermarket straps. Milano Straps offers a curated selection of 16mm straps in leather, rubber, and NATO weave — with buckle or deployant clasp — crafted to fit the Datejust 31 lug geometry precisely, without play or tension.

Longevity depends on the material and daily use. A quality alligator strap, with regular wear and proper care — avoiding prolonged exposure to perspiration and water — typically lasts 2 to 4 years. Vegetable-tanned calf leather develops a natural patina over time but is more sensitive to moisture. Shell cordovan offers the greatest resistance to deformation. Milano Straps provides an 18-month warranty against manufacturing defects on all straps.