Rolex · Datejust 36

Strap for Datejust 36 Rolesor Everose Fluted / Jubilee / Steel Diamonds

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
Reference116231-0100
FamilyDatejust 36
MovementRolex caliber 3135 hours, minutes, seconds | 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 116231-0100

Selected for the 20 mm lug width · workshop selection

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The Datejust 36 116231-0100, seen from the bench

The Rolex Datejust 36 reference 116231-0100 evolves an icon born in 1945, combining 18K Everose gold and 904L stainless steel in a bicolor case of 36mm diameter. It houses the automatic caliber 3135 with bidirectional winding and 48-hour power reserve, COSC chronometer certified for ±4 seconds daily precision. The 20mm lug width represents the optimal balance between elegance and structural robustness for this case diameter.

Frequently asked questions

What is the lug width of the Rolex Datejust 36 reference 116231-0100?

The lug width of the Datejust 36 116231-0100 is precisely 20 millimetres. This is the centre-to-centre distance between the two lugs where any compatible strap is inserted. Correct measurement is essential: a 19mm strap will be loose, whilst a 21mm strap will not close smoothly.

Which type of strap is best suited for the Rolex Datejust 36 116231-0100?

For the Everose-and-steel two-tone, natural alligator (honey or chocolate tones) amplifies formality through its irregular grain. For daily versatility, vegetable-tanned calf in dark brown or black maintains luxury and practicality. For sports use, black rubber straps with tessellated texture offer cushioning and sweat resistance.

How do you change the strap on a Rolex Datejust 36?

You must remove the spring bars (the two small metal cylinders that attach the strap to the lugs). Use a dedicated spring bar tool to compress the internal spring and slide out the bar. Never force with a screwdriver—this will scratch the lugs. Once removed, align the new strap holes with the bars and compress until you hear the click.

Is an aftermarket strap compatible with the Datejust 36 116231-0100?

Yes, provided it is certified for 20mm lug width. Many artisanal manufacturers produce custom straps with tolerances identical to original Rolex specifications. The advantage: access to rare leathers (alligator, shell cordovan), personalised finishes, and production defect warranties up to 18 months.

How long does a leather strap last on a watch like the Datejust 36?

A naturally-tanned alligator strap with vegetable tanning and linen thread stitching lasts 3–5 years with daily wear and maintenance (regular cleaning, protection from extreme humidity). Vegetable-tanned calf straps last 2–4 years. Rubber lasts 4–7 years. Longevity depends on climate, frequency of wear, and build quality of adhesive and stitching.

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