Strap for Datejust 31 Stainless Steel Domed Diamond / Jubilee / Pink MOP - Roman

The Rolex Datejust 31 reference 178344-0033 has a lug width of 16mm. This measurement should be verified using a digital calliper, measuring the internal distance between the two lugs at case level. Strap ends must be shaped (curved-end) to match the specific geometry of Rolex lugs.

For the Datejust 31 with mother-of-pearl dial and two-tone steel and white gold case, a Porosus alligator strap in smoke grey or taupe tones offers the best aesthetic coherence with the dial's iridescence. Alternatively, a vegetable-tanned calf leather strap in ivory or cream develops a natural patina that complements the dial. The recommended clasp is a pin buckle in steel or 18ct white gold, 14mm wide.

To replace the strap on the Datejust 31, use a fine-tipped spring bar tool to release the spring bars connecting the strap to the case lugs. Take care to protect the white gold case surfaces with soft tape and work on a padded surface to avoid scratches. The correct spring bar diameter for 16mm lugs is 1.8mm.

Yes. Aftermarket straps compatible with the Datejust 31 must measure 16mm at the lugs and feature curved (bombé) ends to fit the Rolex lug geometry correctly. Milano Straps produces handcrafted leather, alligator, calf and nylon straps with pre-curved ends specifically designed for this model family. Buckle width typically ranges between 14mm and 16mm depending on the model.

The lifespan of a leather strap depends on leather quality, frequency of wear and exposure to moisture and perspiration. A first-quality Porosus alligator strap, worn on rotation and properly maintained with a neutral leather conditioner every three to four months, typically lasts between three and five years while retaining its structure and appearance. Vegetable-tanned calf leather has a similar lifespan with the added benefit of developing a distinctive patina over time.