Strap for Datejust 31 Rolesor Fluted Diamond / Jubilee / Olive Roman

The lug width of the Rolex Datejust 31 reference 178313-0075 is 16 millimetres. This dimension is standard across all ladies' Datejust 31 models and is the essential parameter for selecting a compatible strap. The 16mm measurement is taken horizontally between the two lug bars positioned at 12 and 6 o'clock on the case.

For the yellow gold and stainless steel Datejust 31, we recommend straps in alligator leather or vegetable-tanned calf. Alligator delivers formal elegance with sophisticated colour matching, whilst vegetable-tanned calf offers softness and natural patina development over time. For everyday wear, a silk or cotton NATO strap provides versatility. The choice depends on occasion and personal texture preference.

Strap replacement on the Datejust 31 is performed by removing the spring bars that connect the strap to the case lugs. A dedicated spring bar tool is required to compress the pin inward and extract it from the lug. Once freed, the old strap detaches easily and the new strap is positioned and secured in the same manner. If you lack the tool, consulting a professional watchmaker is recommended.

The original Rolex strap (Jubilee or Oyster) delivers factory-verified construction precision and proprietary materials. Artisanal aftermarket straps compatible with the Datejust 31, such as those from Milano Straps, enable stylistic personalisation without quality compromise, offering premium materials (alligator, shell cordovan, vegetable-tanned calf) and hand craftsmanship. Both fit the 16mm lugs of the Datejust 31 perfectly.

A high-quality vegetable-tanned leather strap worn daily on a Rolex typically lasts 3–5 years before requiring regeneration or replacement. Longevity depends on leather type (alligator lasts longer), frequency of wear, moisture and perspiration exposure, and maintenance applied. Milano Straps guarantees 18 months against manufacturing defects and offers regeneration services to extend strap life.