Rolex
Datejust 36 116234-0155— lug 20mm

The lug width of the Rolex Datejust 36 reference 116234-0155 is 20 millimetres. This measurement represents the space between the two lugs of the case and is essential when purchasing compatible straps. For precise measurement, use a digital calliper positioned from one shoulder to the other on the same lug, or consult a qualified watchmaker who can complete the measurement within minutes.

The ideal strap for the 116234-0155 depends on context and personal preference. Alligator in chestnut or black tones is the classic choice: the woven texture pairs elegantly with the white gold-stainless two-tone without competing visually. Shell cordovan is a more refined alternative that develops a fascinating patina naturally over time. For a more contemporary style, vegetable-tanned calf leather offers a raw texture that balances the sophistication of the case. For summer, white or cream calf in thin gauge is a versatile option. Avoid rubber and NATO straps on this model: the Datejust is not a sports instrument and deserves sartorial presentation.

To change the strap on a Rolex Datejust 36, you must remove the spring bars that connect the strap to the case lugs. This requires a specialised tool called a spring bar tool. Proceed as follows: position the flathead screwdriver tip of the tool into the pin holes, gently lever outward to release the pin, remove the strap. Reverse the procedure to install the new strap. If you are not experienced, consult a professional watchmaker or contact Casati Milano for bespoke fitting by appointment.

Yes, any strap with a 20-millimetre lug width is compatible with the Datejust 36 116234-0155, regardless of brand. Compatibility is determined solely by lug width, not by the strap manufacturer. Artisanal high-quality straps crafted by Casati Milano are specifically designed for this measurement and offer superior quality compared to lower-tier straps. Ensure the strap thickness is between 3.5 and 4.5 millimetres to guarantee harmonious geometry between strap and case.

The lifespan of a leather strap depends on material quality, tanning process, frequency of use and environmental conditions. A high-quality leather strap made with vegetable tanning has a service life of 3–5 years with daily wear. Alligator leather tends to last longer than most calf leathers, whilst shell cordovan has exceptional resistance and can last 7–10 years. Exposure to excessive moisture, prolonged direct sunlight and temperature fluctuations reduce lifespan. With proper maintenance (protection from rain, storage in a cool environment) longevity increases significantly. Casati Milano straps include an 18-month warranty against manufacturing defects.