Strap for Datejust 31 Stainless Steel / Jubilee / Silver

The Rolex Datejust 31 reference 278240-0006 has a lug width of 16mm. This measurement is specific to the 31mm case diameter and differs from the 20mm of the Datejust 41 and the 13mm of the Lady-Datejust. For a correct strap replacement, it is essential to verify the measurement using a digital calliper placed inside the lugs.

For the Datejust 31 in Oystersteel, a 16mm belly alligator strap in vegetable-tanned leather represents the most coherent choice with the formal register of the case. Alternatively, box calf develops a personal patina over time, ideal for daily wear, whilst vulcanised rubber is suited to sporting or marine contexts. The 16mm width requires precise artisanal finishing of the strap ends to fit the curved Oyster lugs correctly.

To remove the original bracelet or strap from the Datejust 31, use a springbar tool inserted into the small hole on the side of each lug. Apply gentle pressure to compress the spring bar and slide the strap outward. Care must be taken to avoid scratching the Oystersteel case. The new 16mm strap is fitted by hooking one end of the spring bar first, then compressing and engaging the other side.

Yes, high-quality aftermarket straps compatible with the Rolex Datejust 31 278240-0006 are available. The 16mm lug width is less common than standard 18mm or 20mm sizes, so it is essential to source straps from specialist artisan makers who precisely taper the strap ends to ensure a correct fit with the curved Oyster lugs. Milano Straps offers a selection of compatible 16mm straps in various materials.

The lifespan of a leather strap depends on the material, frequency of use, and maintenance. A quality vegetable-tanned alligator strap, worn regularly in rotation with other straps, typically lasts 2 to 4 years. Box calf may last 1 to 3 years. Frequent exposure to perspiration, water, and humidity accelerates deterioration. To extend strap life, it is advisable to avoid wearing it during physical activity or in humid environments, and to apply a neutral conditioner suitable for vegetable-tanned leathers periodically.