Rolex
Datejust 31 278275-0034— lug 16mm

The lug width of the Rolex Datejust 31 278275-0034 is 16mm. This measurement is standard across the entire Datejust 31 range and should be verified with a digital calliper between the lugs before purchasing an aftermarket strap, to ensure a precise fit without lateral play.

For the Datejust 31 278275-0034 in Everose gold, the most suitable materials are vegetable-tanned alligator (belly or hornback) for formal occasions, shell cordovan for a clean profile and long-lasting patina, and box-calf leather for daily wear. Chromatically, burgundy, cognac and midnight blue complement the warm tones of the Everose case effectively.

To replace the strap on a Datejust 31, you will need a precision spring bar tool with a fine tip of 0.6–0.8mm. The spring bars are located inside the lugs: apply gentle lever pressure to avoid scratching the rose gold case. Work on a soft surface and wear cotton gloves. Alternatively, Casati Milano provides professional strap fitting by appointment at the atelier.

Yes. Any strap with a 16mm lug width and straight or slightly curved ends is compatible with the Datejust 31 278275-0034. Milanostraps.it offers a dedicated selection of 16mm straps in leather, rubber and technical materials, handcrafted with finishes and thicknesses calibrated for Rolex lugs. Always verify that the total length (standard 115/75mm) suits your wrist circumference.

Longevity depends on the material and maintenance: a vegetable-tanned alligator strap, conditioned with a neutral cream every 2–3 months, can last 3 to 5 years with regular use. Shell cordovan, owing to the dense fibrous structure of the corium layer, is more resistant to moisture and may exceed 5 years. Box-calf has an average lifespan of 2–3 years. Frequent exposure to water and perspiration significantly reduces the longevity of any leather strap; in such cases a vulcanised rubber strap is recommended.