Strap for Datejust 31 Rolesor Yellow Fluted / Jubilee / Silver

The lug width (also called strap width or lug-to-lug distance) of the Rolex Datejust 31 reference 178273-0030 is 16 millimetres. This measurement represents the internal distance between the two male lugs on the case where the strap is attached. It is essential to verify this compatibility before purchasing an aftermarket strap by using a digital calliper to measure precisely between the two lugs.

For the Datejust 31 178273-0030 in stainless steel and yellow gold, African alligator is the ideal choice for aesthetic integration with the two-tone case. European calf in vegetable tanning offers superior softness and develops a natural patina over time. For those seeking extreme durability, shell cordovan resists scratches better than any other leather. The choice depends on usage: alligator for elegance, calf for versatility, cordovan for durability and longevity.

To change the strap on a Datejust 31, you must remove the spring bars using a specialised tool (spring bar tool). Insert the bifurcated tip of the tool into the spring bar to compress the internal spring, then extract the terminal from the case. Repeat for the opposite lug. Insert the new strap by aligning one terminal first, then compress the spring bar on the opposite side to secure the second terminal. Verify that the strap is properly positioned before wearing the watch.

Yes, provided the strap is specifically designed for a 16mm lug width. Quality aftermarket straps ensure complete compatibility with the Datejust 31. Always verify that the manufacturer declares compatibility with the 16mm measurement and that the terminals are adequately constructed from stainless steel or noble metal to avoid compromising the value of the timepiece.

The lifespan of a leather strap varies depending on material and usage intensity. African alligator and shell cordovan have a lifespan of 5–8 years with moderate daily wear. Vegetable-tanned calf typically lasts 3–5 years with intensive use, as natural leather absorbs perspiration and body oils. Proper maintenance—avoiding prolonged water immersion, drying after perspiration—significantly extends strap life and aesthetic appeal.