Strap for Datejust 31 Yellow Gold / Domed / White - Roman / President

The lug width of the Rolex Datejust 31 278248-0020 is 16 millimetres. This dimension is specific to 31-millimetre models and represents the width of the lateral attachment pins on the case. An aftermarket strap must be constructed with 16-millimetre lugs to ensure correct fit to the original case attachments without play or asymmetrical stress.

Alligator is the ideal material for the 278248-0020 in yellow gold, as its natural texture dialogues elegantly with the luminosity of the precious metal. Alternatively, quality calf leather offers initial softness and develops a brown-hazelnut patina over time. For a more robust solution, structured FKM rubber guarantees water resistance and dimensional stability, whilst shell cordovan represents the choice for those seeking unique depth of colour and continuous evolution.

Strap replacement requires a specific tool for pin extraction. The pins of the Datejust 31 278248-0020 (16mm lug width) must be gently pushed inward toward the case with a rounded-tip instrument, avoiding damage. Once extracted, the old strap can be removed easily. To fit the new 16-millimetre strap, align the strap holes with the pins and push them until they seat naturally, ensuring they are fully secured and symmetrical.

Yes, a custom-made aftermarket strap with 16-millimetre lugs is fully compatible with the 278248-0020. It is essential that the manufacturer specifies exactly this lug width, as compatibility depends on correct geometry of the attachment holes. Specialised watchstrap manufacturers offer straps manufactured to the same tolerances as original Rolex suppliers.

The lifespan of a leather strap depends on intensity of use, sun exposure and climate. A quality alligator strap typically lasts 4-6 years with daily wear, developing a fascinating patina. Vegetable-tanned calf offers slightly shorter durability (3-5 years), whilst shell cordovan can last over 7 years if properly maintained. Regular maintenance with specialist leather conditioners significantly extends strap life.