Rolex · Datejust 36

Strap for Datejust 36 Stainless Steel / Everose / Fluted / White Roman / Oyster

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter36 mm
Reference126231-0016
FamilyDatejust 36
MovementRolex caliber 3235 hours, minutes, seconds | date | chronometer
Year2018
CaseRose Gold, Stainless Steel

Recommended spring bar

Modern Rolex spring bars 20mm — 1.5mm diameter

Technical match for lug width and diameter · lug 20 mm · Ø 1.5 mm · closed lugs

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Straps for the Datejust 36 126231-0016

Selected for the 20 mm lug width · workshop selection

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The Datejust 36 126231-0016, seen from the bench

The Rolex Datejust 36 126231-0016 combines stainless steel 904L and Everose gold in a 36 mm case, representing the evolution of the world's first wristwatch with an instant date window, launched in 1945. The caliber 3235 automatic movement features a Parachrom balance spring in niobium-zirconium alloy, beats at 3 Hz, and offers approximately 70 hours power reserve. Water-resistant to 100 meters with a fixed bezel and sapphire crystal, this model features a 20 mm lug width, the standard for mid-size Datejust watches.

Frequently asked questions

What is the lug width of the Rolex Datejust 36 126231-0016?

The lug width of the Rolex Datejust 36 126231-0016 is 20 millimetres. This is the standard for mid-sized Datejust models and determines compatibility with aftermarket straps. To measure the lug width, use a digital calliper, positioning the tip on the horizontal axes of the two movement pins on the case. On milanostraps.it you will find a complete selection of 20mm straps compatible with this model.

What is the best strap for the Rolex Datejust 36 126231-0016?

The best strap depends on your usage and aesthetic preference. For formal elegance, we recommend alligator with vegetable tanning: the natural grain amplifies the preciousness of rose gold and develops a patina over time. For sporting versatility, shell cordovan offers structural rigidity and a patina that improves over the years. For classic discretion, calf offers a homogeneous surface and superior flexibility. Jacquard canvas NATO is ideal for casual contexts. The deployant must always be in solid metal without play.

How do you change the strap on the Rolex Datejust 36 126231-0016?

Changing the strap requires two fundamental tools: a spring bar tool and a micro-tweezers. Position the watch on a stable base with the dial facing downwards. Insert the blade of the spring bar tool into the small lateral space of the movement pin (lug) to be removed, applying gentle inward pressure to compress the spring. Once the pin is loosened, remove it completely. Repeat the operation on the other pin. Insert the new strap by guiding the pin through the case holes, ensuring that the spring returns to position. If you are unsure, consult a professional.

Is it possible to use a compatible aftermarket strap on the Rolex Datejust 36 126231-0016?

Absolutely yes. Any 20mm strap is mechanically compatible. What matters is choosing a strap of quality equivalent to that of the Rolex: this means noble materials (alligator, calf, shell cordovan), certified artisanal workmanship, and a solid metal deployant. On milanostraps.it you will find artisanal straps made in Italy that meet these quality standards and allow the Datejust 36 to express its aesthetic potential.

How long does a leather strap last on the Rolex Datejust 36 126231-0016?

Durability depends on the material and usage. An alligator strap with vegetable tanning lasts 4-6 years with daily use, developing a desirable patina over time. Shell cordovan, thanks to its fibrous membrane, can last 6-8 years and beyond, improving with ageing. Calf tends to show more evident signs of wear after 3-5 years. A canvas NATO lasts longer but requires periodic cleaning. All straps made by Casati Milano will include an 18-month warranty on manufacturing defects: this protects your investment.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only