Rolex
Datejust 31 178341-0054— lug 16mm

The lug width of the Rolex Datejust 31 178341-0054 is 16 millimetres. This measurement is precise and allows no variation: any compatible strap must be constructed to this exact specification to ensure a perfect fit and harmonious aesthetic proportion.

The best strap depends on your personal style and intended use. For absolute elegance we recommend alligator in cognac or brown tones; for versatile daytime wear a vegetable-tanned calf in black or taupe; for those seeking maximum longevity and patina development, shell cordovan. All these materials are available in 16mm lug width through our artisans.

Strap replacement requires a specific tool (spring bar tool) or a small screwdriver. Position yourself in natural light, insert the tool into the small hole beneath the lug, press gently downward to release the attachment pin, and slide out the old strap. Reinsert the new 16mm strap, aligning it perfectly before releasing the pin. If you prefer not to perform the operation yourself, any experienced watchmaker can complete it in minutes.

Yes, provided the strap is constructed precisely to 16mm lug width. Compatibility is determined by the physical measurement of the lug, not by the watch brand. An artisanal Casati Milano strap in alligator or calf with 16mm lug attachment fits your Datejust 31 perfectly, offering the same quality and longevity as an original Rolex strap.

Durability depends on the material and usage. A vegetable-tanned calf strap, if properly maintained and rotated with other straps, lasts 5-8 years. Alligator and shell cordovan, being denser and more robust leathers, can last 10-15 years. Deterioration primarily affects the leather around the buckle and lug; the central leather usually remains intact. Store the strap in a dry location and protect from direct sunlight.