Rolex
Datejust 36 116203-0125— lug 20mm

The lug width (also called strap width or ansa width) of the Rolex Datejust 36 116203-0125 is precisely 20 millimetres. This measurement is consistent across all Datejust 36 references regardless of production year or case material configuration. To verify, place a ruler against the inner face of the lug, perpendicular to the spring bar holes: you will read exactly 20mm.

The optimal strap choice depends entirely on your dial configuration. For a champagne dial, we recommend vegetable-tanned calf leather in cognac tone. For slate blue or black dials, burgundy shell cordovan or satin-finished black calf represent the ideal aesthetic pairings. Natural brown alligator offers an evolving patina that renders each watch uniquely personal over time.

Carefully remove the current strap by extracting the spring bars from the lugs using a dedicated spring bar tool. Insert the new spring bars through the replacement strap, then feed each bar through one lug and across into the opposite lug. Ensure bars are fully seated and the strap alignment is symmetrical across the case.

Any strap featuring a 20mm lug width is fully compatible with the Datejust 36 116203-0125. Our collections encompass alligator, box calf, shell cordovan, military-style NATO fabrics, and technical rubber compounds. Each strap is available with or without a deployante clasp according to personal preference.

Leather strap longevity depends on material type and daily wear intensity. Alligator and shell cordovan, when maintained regularly (conditioning every 6-8 months), will serve 5-7 years reliably. Box calf, being more delicate, typically performs for 3-4 years under moderate wear. Casati Milano guarantees all straps against manufacturing defects for a full 18 months.