Strap for Datejust 31 White Gold Diamond / President / Rhodium Roman

The lug width of the Datejust 31 178159-0048 is 16 millimetres. This width is characteristic of 31 mm Datejust models and is measured between the lugs (attachment points) of the white gold case. It is essential to respect this exact measurement to ensure perfect strap installation without play or abnormal tension.

For the 178159-0048 in white gold, we recommend vegetable-tanned alligator in medium brown, which echoes the colour temperature of white gold and creates subtle contrast. Valid alternatives include black calf box for urban elegance, and dark brown shell cordovan for those desiring patina that evolves over time. In black FKM rubber, the strap maintains daily practicality without sacrificing the formal character of the watch.

Strap change requires specific tools: a spring bar tool (two-pronged device) to extract the elastic pins. Position yourself with natural light, take the old strap and use the tool to compress one of the side pins, then slide the lug out of the case. Repeat on the opposite side. Proceed in reverse with the new strap, ensuring the pins are perfectly locked. If you lack confidence, entrust the task to a Rolex-certified technician.

Yes, provided it respects the 16-millimetre lug width. High-quality aftermarket straps, such as those from Casati Milano, are fully compatible with the 178159-0048. Compatibility is guaranteed by lug width: 16 millimetres universal. Avoid poor-quality straps, as they may damage the white gold attachment pins.

A quality leather strap (alligator, calf, shell cordovan) lasts 3–5 years of daily wear, with variability depending on climate and frequency of use. Vegetable-tanned leathers darken and develop patina over time, imparting character. Longevity depends on maintenance: avoid prolonged moisture, direct intense sunlight, and dry gently if wet. Casati Milano guarantees 18 months against manufacturing defects.