Strap for Datejust 36 Stainless Steel / Diamond / Aubergine Roman-Diamonds / Jubilee

The lug width (also called lug width or bar distance) of the Rolex Datejust 36 126284RBR-0013 is 20mm. This is the standard specification for the Datejust medium case: the distance between the spring bars (the attachment points at 12 and 6 o'clock) measures exactly 20 millimetres. This dimension has remained consistent in Rolex's design philosophy to maintain the classic visual proportions of this model.

For a bi-metal Datejust 36 in white gold and stainless steel (Rolesor), alligator leather in cognac or hammer-finished calf in dark brown represent the canonical choices. Alligator creates a sophisticated aesthetic dialogue with the white gold reflections, whilst calf offers daily versatility whilst maintaining an elegant profile. Shell cordovan in burgundy is ideal if you desire a noble patina that develops over time.

Strap change requires a dedicated tool called a spring bar tool. Position the watch on a soft cloth, locate the spring bar attachment, insert the tool underneath the bar and gently lift until the internal spring releases. Extract the bar from the case holes, then repeat the procedure on the opposite side. To avoid scratches, it is advisable to consult an authorised service centre or a specialist craftsman such as Casati Milano.

Yes, any strap with a 20mm lug width is compatible. It is essential to ensure that the aftermarket strap has correctly spaced attachment holes and that the material is of sufficient quality not to detract from the watch. Handcrafted leather straps, such as those from Casati Milano, guarantee perfect compatibility and a longevity comparable to the original Rolex strap.

A quality leather strap, with proper maintenance, has an average lifespan of 3–5 years depending on intensity of use and leather type. Alligator and shell cordovan age nobly even beyond 5 years, developing a patina. Calf and satin rubber require more regular maintenance. Casati Milano provides an 18-month warranty on manufacturing defects and recommends periodic cleaning with leather-specific balms to extend useful life.