Strap for Datejust 31 Yellow Gold Diamond / Oyster / Silver

The Rolex Datejust 31 ref. 178158-0087 features a lug width of 16mm. This measurement refers to the internal distance between the two lugs of the Oyster case in 18ct yellow gold and is the key parameter for selecting a compatible strap. It should not be confused with the case diameter, which is 31.00mm.

For an 18ct yellow gold case measuring 31mm, a vegetable-tanned alligator strap with a gold deployant clasp is the most coherent pairing both aesthetically and technically. Shell cordovan offers a more understated alternative with a natural patina, while vulcanised rubber is suitable for sportier wear. The correct attachment width is 16mm.

To replace the strap on a Datejust 31, the spring bars securing the bracelet or strap to the Oyster case lugs must be removed using a spring bar tool. It is advisable to work on a soft cushion to protect the yellow gold case and to entrust the operation to a watchmaker or experienced technician if using the tool for the first time.

Yes. Any strap with a 16mm attachment and standard spring bars is technically compatible with the Datejust 31. Milano Straps produces and selects handcrafted 16mm straps in alligator, calf leather, shell cordovan and rubber, specifically dimensioned for the Oyster lugs of this model, with straight ends for correct fit against the case profile.

Longevity depends on the material, frequency of use and maintenance. A quality vegetable-tanned alligator strap, worn with care and rotated with other straps, can last between three and five years while developing a dignified patina. Shell cordovan tends to last even longer due to the density of its fibres. Perspiration is the primary cause of degradation; leather straps are not recommended during intense physical activity.