Rolex
Datejust 31 178274-0017— lug 16mm

The lug width of the Rolex Datejust 31 178274-0017 is 16 millimetres. This dimension corresponds to the space between the two lugs of the case where the strap is fitted. Measuring the lug width accurately is essential to ensure compatibility and a perfect fit without play or twisting during daily wear.

For the Datejust 31 178274-0017, the ideal strap is alligator: the natural scale texture amplifies the refinement of the bi-colour case in white gold and steel. Alternatively, vegetable-tanned calf leather offers superior versatility and develops a splendid patina over time. For aquatic environments, a rubber strap maintains Oyster waterproofness without aesthetic compromise.

To change the strap, position your watch on a soft surface with the lugs facing upward. Using a spring bar removal tool or a small lever, gently compress the internal spring of the lug and extract the pin that secures the strap to the case. Repeat on the other side. Next, position the new strap, aligning the two holes, and reinsert the lugs until they click into place. If you are inexperienced, consult a professional watchmaker to avoid scratches.

Yes, you can use a quality artisan aftermarket strap, provided the lug width is precisely 16 millimetres. An aftermarket strap made from fine leather (alligator, calf, shell cordovan) or certified rubber can not only offer perfect mechanical compatibility but also allow superior aesthetic customisation compared to standard Rolex straps, whilst maintaining the elegance and value of the watch.

The lifespan of a leather strap depends on the quality of craftsmanship and the type of tanning. An alligator or vegetable-tanned calf strap, handcrafted, has an average life of 4–6 years with moderate daily wear. A shell cordovan strap, more durable, can extend to 5–7 years. The main wear occurs around the buckle and lugs. Regular maintenance with products designed for leather extends longevity and improves patina development over time.