Rolex
Datejust 36 126234-0030— lug 20mm

The lug width of the Rolex Datejust 36 reference 126234-0030 is 20 mm. This measurement is taken with a digital calliper across the internal distance between the two lugs, flush with the crystal surface. It is the critical parameter when selecting a compatible replacement strap.

For the Datejust 36 126234-0030 in white gold and Oystersteel, a vegetable-tanned alligator strap offers the most coherent match for the case's bi-metal formal register. The scale texture echoes the fluted bezel, while the progressive patina of the leather enhances the strap over time. For a more casual setting, a nylon NATO or vulcanised rubber strap are technically sound alternatives.

The strap on the Rolex Datejust 36 is secured via 20 mm spring bars, which are removed using a flat-blade screwdriver or a dedicated springbar tool. Care should be taken to avoid scratching the Oystersteel case: protecting the lug area with a soft cloth during the operation is strongly recommended. Casati Milano offers in-person strap-fitting assistance at the Milan atelier by appointment.

Yes, the aftermarket offers a wide range of straps compatible with the 20 mm lug width of the Datejust 36. Artisan manufacturers such as Casati Milano produce bespoke straps in selected leathers — alligator, calf, shell cordovan — with customisable taper and your choice of steel buckle or deployant clasp. Dimensional compatibility is ensured by the standard 20 mm lug width.

The lifespan of a leather strap on a Rolex Datejust 36 depends on the type of leather and frequency of wear. A vegetable-tanned alligator strap, kept away from excessive moisture and perspiration and occasionally treated with a leather conditioner, can last between 3 and 6 years whilst developing a distinctive patina. Calf leather straps generally have a shorter lifespan of 1 to 3 years under equivalent conditions.