Strap for Datejust 31 Yellow Gold Fluted / Oyster / Black MOP

The Rolex Datejust 31 178278-0113 features a lug width (misura ansa) of 16 millimetres. This measurement is the space between the lateral lugs of the case where the strap is attached. To verify this dimension, use a ruler or digital calliper, positioning it between the spring bar holes on the case. All straps in the 16mm collection on Milano Straps are fully compatible with this model.

For a Datejust 31 178278-0113 in 18-carat yellow gold, we recommend alligator in dark brown or moro tone, which amplifies the elegance of the precious metal. Alternatively, Italian calf leather from vegetable tanning in cognac or burgundy develops a fascinating aged patina. Shell cordovan offers a natural lustrous finish and excellent durability. For more casual contexts, black vulcanised rubber with yellow gold accents maintains aesthetic coherence without compromising versatility.

To change the strap on your Datejust 31, remove the spring bars using a dedicated tool or thin knife. Insert the tool beneath one spring bar, lift slightly and retract the internal spring, then extract the bar. Repeat on the other side. Once the case is free, align the new strap's holes with the lug holes, reinsert the spring bars in the same sequence, ensuring the return springs engage correctly.

Yes, absolutely. A quality aftermarket strap with 16mm lug width is fully compatible with the Datejust 31 178278-0113. Milano Straps offers artisanal leather and rubber straps specifically engineered for this dimension, crafted from materials of excellence such as alligator, vegetable-tanned calf and shell cordovan. Using a custom strap does not void Rolex warranty and allows you to personalise your timepiece according to personal style.

The lifespan of a leather strap depends on material quality and frequency of use. An artisanal alligator or shell cordovan strap lasts approximately 3–5 years with daily wear, whilst vegetable-tanned calf can extend to 4–6 years thanks to the protective patina it develops over time. Exposure to moisture, direct sunlight and perspiration accelerates wear. Milano Straps provides an 18-month warranty on manufacturing defects and offers maintenance and replacement services at the Casati Milano atelier.