Rolex
Datejust 31 278248-0015— lug 16mm

The Rolex Datejust 31 278248-0015 has a lug width of 16mm. This measurement is taken internally between the two lugs at their narrowest point using a calliper, and is essential for selecting a correctly sized aftermarket strap.

For the yellow gold Datejust 31, an alligator strap with hornback grain in chocolate or tobacco tones best complements the warm metal of the case. Vegetable-tanned box calf leather is preferable for daily wear, developing a distinctive patina over time. For sporting contexts, vulcanised rubber provides water resistance without compromising aesthetics.

To replace the strap on the Datejust 31, a fine-tipped spring bar tool is required. Insert the tool between the lug and the original bracelet, compress the spring bar and slide the bracelet free. The new 16mm strap should be fitted into the lugs, ensuring the spring bars are correctly seated in both holes. Care should be taken to avoid scratching the yellow gold case.

Yes. The Datejust 31 accepts any strap with a 16mm attachment and end pieces compatible with the Oyster lugs. Milano Straps offers handcrafted straps in alligator, calf leather, NATO and rubber, made to measure with spring bars included. It is important to verify that the strap ends (straight or curved) match the lug profile of the model.

The lifespan of a leather strap depends on the material and frequency of wear. A quality alligator strap with vegetable tanning can last between three and seven years with regular use, provided it is kept away from moisture. Box calf tends to soften sooner but develops a personal patina. Rotating between multiple straps significantly extends the life of each, preventing the build-up of perspiration on a single piece.