Rolex
Datejust 31 178248-0094— lug 16mm

The lug width of the Rolex Datejust 31 ref. 178248-0094 is precisely 16 millimetres. This measurement is taken between the two internal points of the spring bar and represents an exact specification that requires conscious sourcing of compatible straps. The lug depth is 2.5 millimetres, a confined space that favours noble leathers and systems with deployante clasps.

For the Datejust 31 in yellow gold, we recommend Nile alligator in dark brown or cognac tones, which dialogue naturally with the warmth of the precious metal. Alternatively, Tuscan vegetable-tanned calfskin or shell cordovan offer refined textures and ageing characteristics that mirror the gold's patina development. Avoid synthetic materials: yellow gold deserves integrity in materials.

Strap replacement requires a specialist spring bar tool. Place the watch on a soft surface, access the lugs from the caseback and gently press the safety pin of the spring bar with the tool, allowing the old strap to detach. Reinsert the spring bar into the new 16mm strap using the reverse procedure. If inexperienced, consult a jeweller or specialist craftspeople.

Yes, any strap with a 16mm lug width is compatible with the Datejust 31 178248-0094, provided it is of good construction and appropriate length (approximately 75–85 mm total length). We recommend straps produced by specialists in noble leathers rather than mass-market productions: the Datejust merits craftsmanship that amplifies its proportions and yellow gold presence.

Longevity depends on material and maintenance. A superior-quality alligator or calfskin, worn daily with ordinary care, typically lasts 5–7 years. Shell cordovan, owing to its density, may endure 10 years or more. Vegetable-tanned leather develops natural patina and improves aesthetically over time, but requires occasional moisture protection. Avoid prolonged direct sunlight and excessive heat exposure.