Strap for Datejust 31 Rolesor Fluted Diamond / Jubilee / Silver Computer

The Rolex Datejust 31 reference 178313-0028 has a lug width of 16 mm. This measurement is critical when selecting any aftermarket strap: it should be confirmed with a digital calliper placed on the inner face of the lugs before purchasing a replacement strap.

For the Datejust 31 in Rolesor (yellow gold and stainless steel), a vegetable-tanned alligator strap with a centre-cut grain pattern is the most stylistically coherent choice. Smooth polished calf leather offers a modern and versatile alternative, while shell cordovan provides exceptional density and longevity. For more active use, vulcanised rubber delivers water resistance without compromising aesthetics. All options must feature 16 mm attachment ends.

Replacing the strap on a Datejust 31 requires a precision springbar tool with a fine fork tip. Insert the tip between the lug and the strap end, compress the spring bar and slide it out laterally. Care must be taken to avoid scratching the case. If you are unfamiliar with the process, it is advisable to consult a watchmaker or visit the Casati Milano atelier.

Yes. Several artisan manufacturers produce 16 mm aftermarket straps compatible with the Datejust 31. Milano Straps offers a curated selection of 16mm straps with shaped ends designed to follow the curvature of the Rolex case back, ensuring correct fit and alignment. The standard configuration for this model is 16 mm at the attachment end, typically tapering to 14 mm at the buckle end.

The lifespan of a leather strap depends on the quality of the hide, the tanning process and daily care. A high-grade vegetable-tanned alligator strap, worn regularly but not continuously, can last between three and seven years while retaining its aesthetic integrity. Shell cordovan tends to last even longer due to the compactness of its fibres. Prolonged contact with water, perfumes and perspiration should be avoided, and rotating between multiple straps is recommended to reduce mechanical stress on each one.