Strap for Datejust 31 Stainless Steel Domed / Oyster / White

The Rolex Datejust 31 ref. 178240-0024 has a lug width of 16mm. This measurement is taken between the lugs at the caseback end using a digital calliper or precision ruler. Any aftermarket strap must have a 16mm attachment width to ensure a correct fit without lateral play.

For the Datejust 31 in Oystersteel, alligator leather with a polished grain or vegetable-tanned calf leather are the most coherent choices for the character of this watch. Shell cordovan is recommended for those seeking density and resistance to deformation. For sports or summer use, vulcanised rubber is the most reliable technical option. All straps must have a 16mm attachment width.

To replace the strap on the Datejust 31, the spring bars connecting the bracelet or strap to the case lugs must be removed. Use a spring bar tool with a fine tip, applying leverage against the inner lug flange. Work on a soft surface to avoid scratching the case. If replacing an integrated Oyster or Jubilee bracelet, the attachment segment must also be disassembled.

Yes. The aftermarket offers a wide selection of straps compatible with a 16mm lug width, suitable for the Datejust 31. Milano Straps offers handcrafted leather, rubber and textile models specifically selected for this width. For a bespoke result, the Casati Milano atelier produces made-to-measure straps following the exact proportions of the 31mm case.

The lifespan of a leather strap depends on the material, frequency of use and conditions of wear. A quality vegetable-tanned calf strap, worn regularly but kept away from water, typically lasts between 18 and 36 months. Alligator and shell cordovan, due to the higher fibre density, tend to last longer and develop a characteristic patina over time. Avoiding prolonged exposure to water and perspiration significantly extends strap life.