Rolex
Datejust 31 278248-0028— lug 16mm

The lug width of the Rolex Datejust 31 reference 278248-0028 is 16mm. This measurement is taken with a digital calliper positioned between the two lugs, flush against the case. This is specific to the 31mm family and is not interchangeable with straps for the Datejust 36mm (20mm) or Lady-Datejust 28mm (13mm).

For the Datejust 31 278248-0028 in 18-carat yellow gold, a polished alligator strap is the most coherent choice given the watch's haute joaillerie character. Alternatively, vegetable-tanned calf leather develops a distinctive patina over time, while shell cordovan offers natural resilience and sheen. In all cases, a yellow gold deployant clasp maintains the correct metallic continuity with the case.

To replace the strap on a Datejust 31, you will need a fine-tipped spring bar tool or a watchmaker's screwdriver with a 0.8mm blade. Rolex lugs use spring bars with pressure-release ends: insert the tool into the small hole on the side of the lug and compress the spring bar inward to release it. Exercise caution to avoid scratching the gold case. For best results, we recommend entrusting the operation to a qualified watchmaker.

Yes, high-quality aftermarket straps compatible with the Rolex Datejust 31 278248-0028 are available, provided they feature 16mm ends with the correct geometry for Rolex lugs. Milano Straps offers handcrafted straps in alligator, calf leather, shell cordovan and rubber, complete with stainless steel spring bars. Proper fitment is ensured through bespoke lug tapering.

The lifespan of a leather strap depends on the material, frequency of use, and exposure to perspiration and moisture. A quality alligator strap, rotated with other watches, retains its characteristics for 3 to 5 years. Vegetable-tanned calf develops patina over time but is more susceptible to humidity. Shell cordovan is among the most durable options. Milano Straps backs its straps with an 18-month warranty against manufacturing defects.