Rolex · Day-Date 36
Strap for Day-Date 36 Platinum Domed / President / Ice Blue
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Day-Date 36 118206-0040
Selected for the 20 mm lug width · workshop selection
Matte Dark Gray Alligator Strap€195
Black Alligator Strap with Light Red Edging€149
Vintage Alligator Strap Cognac€195
Hammered Pink Strap with Ecru Stitching€98
Vintage Brown Calfskin Strap — Natural Patina€98
Frequently asked questions
What is the lug width of the Rolex Day-Date 36 118206-0040?
The lug width of the Rolex Day-Date 36 118206-0040 is 20 millimetres. This lug width is the standard measurement for this reference and determines the compatibility of all aftermarket straps. It is essential to verify that the strap you choose has been specifically designed for a 20mm lug width, as using an incorrect measurement would result in fitting issues with the case and could compromise the structural integrity of the connection.
Which strap material is most suitable for the Day-Date 36 in platinum?
For a Day-Date 36 118206-0040 in platinum, the most recommended materials are high-grade alligator and calf leather. Alligator offers a natural texture that pairs beautifully with the icy white of platinum, enhancing its luminosity. Calf leather, preferably with vegetable tanning, provides a warmer patina and develops unique character over time. Avoid sporty materials such as nylon or rubber, which would be stylistically incongruous with the model's formal architecture.
How do you change the strap on a Rolex Day-Date 36?
Strap replacement requires the use of a spring bar remover, a tool with an appropriately shaped tip that inserts into the lateral slots of the case lug. Carefully position the tool in the recess and apply gentle downward pressure to compress the internal spring, releasing the passant. Repeat the operation on the other side. During this procedure, always protect the case with a cloth to prevent scratches. If you are inexperienced or concerned about causing damage, the replacement can be performed by an authorised Rolex dealer or a specialised atelier.
Is it possible to use an aftermarket strap on a Day-Date 36 118206-0040?
Yes, absolutely. A high-quality artisanal aftermarket strap is not only compatible, but often preferable for customisation and durability. It is essential that the strap is crafted with a 20mm lug width and respects the aesthetic proportions of the model. A bespoke strap created to measure guarantees perfect fit, robust construction and the opportunity to personally select the material, colour and finishing details. Casati Milano, a Milan-based sartorial atelier, offers the possibility of following every phase of realisation and adapting the strap to your aesthetic preferences.
How long does a natural leather strap last on a luxury watch?
The durability of a natural leather strap depends on the type of tanning, usage and maintenance. A strap crafted with high-quality vegetable tanning can remain in excellent condition for 5-8 years with moderate daily use. Alligator, being more resistant, tends to last slightly longer. Factors affecting longevity include exposure to water, perspiration and UV rays. Proper maintenance, which includes periodic cleaning and application of specific protective treatments, significantly extends the life of the strap. An artisanal strap such as those from Casati Milano is covered by an 18-month warranty against manufacturing defects.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only

