Rolex · Day-Date 36
Strap for Day-Date 36 Yellow Gold Diamonds / Oyster / Lavender Jade Carousel
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 118388-0158
Selected for the 20 mm lug width · workshop selection
Black Alligator Strap with Light Blue Edges€210
Black Alligator Strap with White Edges€210
Millenium Cognac Alligator Strap€270
Matte Blue Alligator Strap€270
Green Rubberized Alligator Strap with Ecru Tribal Stitching€185
The Day-Date 36 118388-0158, seen from the bench
Frequently asked questions
What is the lug width of the Rolex Day-Date 36 118388-0158?
The Rolex Day-Date 36 reference 118388-0158 features a lug width of 20 millimetres. This measurement is standard for the yellow gold Day-Date 36 model and cannot be modified. The width is measured by inserting a digital calliper between the lugs of the case, or by consulting the official Rolex warranty certificate. Always verify the measurement before ordering an aftermarket strap to avoid incompatibility.
Which strap is most suitable for the Rolex Day-Date 36 yellow gold?
American alligator in cognac tone is the most iconic choice for the 118388-0158: the natural scalar grain pairs seamlessly with the yellow gold case and champagne dial. Alternative options of absolute quality include French vegetable-tanned calfskin, which develops a caramel patina over time, and shell cordovan for those seeking structural solidity and inherent lustre. FKM rubber straps are ideal for sports use without aesthetic compromise.
How do you change the strap on a Rolex Day-Date 36?
Strap replacement requires specific tools: a pin remover in stainless steel or soft plastic, and a magnifying lens for precision work. Position the watch on an anti-scratch base, identify the pin's direction of removal (typically inward), apply controlled pressure for 2–3 millimetres until the pin releases. Extract the old strap gently and insert the new one, aligning the holes carefully. The procedure takes 10–15 minutes. If unfamiliar with the process, consult a certified Rolex watchmaker.
Is a high-quality aftermarket strap compatible with the 118388-0158?
Yes, provided the lug width is precisely 20 millimetres. Artisanal straps of superior quality, crafted by specialised ateliers, often offer levels of finishing comparable to or exceeding original Rolex pieces, featuring carefully selected leather and hand-stitching. It is essential to verify that the strap is free from deformations, that buckles are fashioned from precious metals (stainless steel or gold), and that the warranty covers manufacturing defects. Favour producers offering tracked delivery and clear return policies.
What is the typical lifespan of a leather strap on a Rolex of this calibre?
A high-quality leather strap—alligator, calfskin, or shell cordovan—typically lasts 3–5 years of daily wear, depending on climate, humidity, and frequency of use. The leather develops a natural patina and inevitably thins; this is normal. Certain materials, such as cordovan, age in a more predictable manner and may last up to 7 years. Proper maintenance extends lifespan: store the watch in a dry environment, avoid prolonged contact with fresh and salt water, and apply a natural leather conditioner every 6–8 months.
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

