Rolex
Datejust 31 178344-0028— lug 16mm

The Rolex Datejust 31 reference 178344-0028 features a lug width of 16mm. This measurement is taken with a digital calliper positioned between the two lugs at the point of contact with the case. It is a specific dimension that requires straps built precisely to this width to ensure correct installation without mechanical play.

For the Datejust 31 178344-0028 in white Rolesor, an alligator strap in vegetable-tanned leather in cool tones — slate grey, midnight blue or black — is the most coherent choice with the watch's aesthetic. The transverse grain enters into visual dialogue with the diamond-set dial. Alternatively, shell cordovan offers a compact surface with natural patina, while vulcanised rubber suits sporting use without compromising the watch's formal character.

To replace the strap on a Datejust 31, the spring bars connecting the bracelet or strap to the case lugs must be removed. A spring bar tool with a fine tip is inserted into the lateral notch of the spring bar to compress the spring and slide it free from the lug. This operation should be carried out carefully to avoid scratching the white gold surfaces. The new 16mm strap is fitted in reverse sequence.

Yes, numerous artisan manufacturers produce aftermarket straps compatible with the 16mm lug width of the Datejust 31. Milano Straps offers a selection of leather, rubber and textile straps specifically constructed for this width, with shaped ends to follow the curvature of Rolex Oyster lugs. Compatibility is guaranteed by the 16mm lug width, regardless of whether the original bracelet or an aftermarket piece is used.

The longevity of a leather strap depends on leather quality and frequency of use. A high-quality vegetable-tanned alligator strap, rotated with other watches and kept away from excessive moisture, typically lasts between three and five years while retaining structural integrity and a well-kept appearance. Shell cordovan, owing to its fibre density, tends to last even longer, developing an appreciable patina over time. Milano Straps straps carry an 18-month guarantee against manufacturing defects.