Rolex
Datejust 36 116243-0018— lug 20mm

The lug width of the Rolex Datejust 36 reference 116243-0018 is 20 millimetres. This measurement is determined by the case geometry and represents the standard construction width for all 36-millimetre Datejust models. Any compatible strap must respect this measurement to ensure a perfect fit without lateral play between the lugs.

For a Datejust 36 116243-0018 with a mother-of-pearl dial, the choice depends on the dial's hue. For pure white mother-of-pearl, we recommend white alligator or cream calf. For champagne mother-of-pearl, a warm brown alligator or aged shell cordovan creates visual harmony with the 18-carat yellow gold and steel combination. Avoid pure black straps, as they would contrast excessively with the two-tone case.

To change the strap, you must remove the spring bars attached to the lugs using a dedicated spring bar tool or a thin flat tool. Gently push the bar upward from one side until it springs free from the lug, then repeat on the other side. Insert the new strap by aligning the holes with the bars, then allow the retaining rings to snap back into place. If unsure, consult an authorised service centre or specialised strap artisan.

Yes, provided the strap has a certified 20-millimetre lug width. Quality aftermarket straps in alligator, calf, shell cordovan or rubber are perfectly compatible with the 116243-0018. Compatibility is both mechanical—the lug fits the holes—and aesthetic: we recommend verifying that colour and material harmonise with the mother-of-pearl dial and case metals.

The lifespan of a leather strap depends on usage, material and environmental conditions. A quality artisanal alligator or shell cordovan strap, subjected to moderate daily wear, offers a lifespan of 4–6 years. A vegetable-tanned calf strap may last 3–5 years. Direct sunlight and humidity exposure shorten strap life. Proper maintenance—periodic cleaning, conditioning with specific creams and storage in a dry environment—significantly extends the life of the piece.