Strap for Datejust 31 White Gold - Diamond / Blue - Floral / President

The lug width of the Rolex Datejust 31 278289RBR-0025 is 16mm. This measurement refers to the internal distance between the case lugs, measured at the 6 o'clock side, and is the key parameter for selecting a compatible strap. It is specific to this version of the Datejust 31 and is not interchangeable with lug widths of other Rolex references.

For the Datejust 31 278289RBR-0025 in white gold with diamond-set bezel, a smooth alligator strap — belly-cut or hornback — with a polished finish is the most technically and aesthetically coherent choice. The regular grain of the alligator complements the watch's precious texture without competing with it. Alternatively, vegetable-tanned calf leather develops a patina over time, appreciated by daily wearers. For more casual settings, an opaque vulcanised rubber strap in 16mm is a modern and hardwearing option.

The strap on the Datejust 31 278289RBR-0025 is secured by standard 16mm spring bars fitted into the case lugs. To replace it, use a spring bar tool, inserting the tip into the notch on the spring bar near the lug and compressing it to release it. The operation does not require any Rolex-specific tools but should be carried out carefully to avoid scratching the white gold case. It is advisable to rest the watch on a soft cloth and work on a stable, well-lit surface.

Yes, numerous aftermarket straps are compatible with the Datejust 31 278289RBR-0025, provided they feature precisely calibrated 16mm attachments. MilanoStraps produces and sells handcrafted straps in various leathers — alligator, calf, shell cordovan — specifically available in 16mm. The standard recommended length is a short piece (approximately 70mm) and a long piece (approximately 115mm), suited to the small-to-medium wrist typical of a 31mm wearer. Always select straps that include spring bars to ensure mechanical compatibility.

The lifespan of a leather strap depends on the material, frequency of wear and level of care. A quality alligator strap on a Datejust 31 worn occasionally can last 5–8 years while retaining structural integrity and a well-kept appearance. Vegetable-tanned calf, being more porous, is more susceptible to perspiration and moisture: with intensive daily use, the average lifespan reduces to 2–3 years. To extend longevity, avoid prolonged contact with water, apply a leather conditioner periodically, and consider a deployant clasp to reduce repeated flexion at the highest-stress point.