Rolex
Datejust 36 126231-0025— lug 20mm

The Rolex Datejust 36 reference 126231-0025 features a lug width of exactly 20 millimetres, measured between the internal spring bars. This specification was established by Rolex to maintain optimal proportions with the 36mm case. Always verify the measurement with callipers on your specific watch before purchasing a replacement strap.

The ideal strap depends on your intended use. Alligator (with characteristic spine texture) delivers maximum formality and develops an elegant patina over time. Vegetable-tanned calf offers daily versatility and a soft grain that adapts to the wrist. For the rose gold and steel two-tone case, straps in dark brown, cognac or deep burgundy create superior aesthetic harmony compared to cool-toned options.

Strap replacement requires a dedicated tool (strap removal pin or precision spring bar tool) to extract the spring bars securing the strap to the case. Place your watch on a soft cloth, locate the lateral spring bar on the non-crown side, and gently press it downward until it releases. Repeat on the opposite side. If uncertain, entrust the procedure to an authorised Rolex service centre or qualified watchmaker.

Yes, provided the strap features a certified 20-millimetre lug width and proportionate thickness to the case (typically 3.5–4mm). High-quality Italian artisanal straps in alligator, calf or shell cordovan with vegetable or synthetic tanning are entirely compatible. Ensure your supplier specifies the lug width and offers a product guarantee.

Longevity depends on material and usage patterns. Vegetable-tanned calf typically endures 3–5 years of daily wear before replacement, though the patina improves with age. Alligator is more durable (5–8 years) and develops intrinsic beauty. Shell cordovan easily surpasses 10 years. Daily frequency of use, sunlight exposure and humidity affect lifespan. A well-maintained strap, not subjected to constant mechanical stress, may be restored rather than replaced.