Rolex · Datejust 31
Strap for Datejust 31 Rolesor Everose Domed Diamond / Oyster / Black MOP
Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Datejust 31 178341-0034
Selected for the 16 mm lug width
The Datejust 31 178341-0034, seen from the bench
Frequently asked questions
What is the exact lug width of the Rolex Datejust 31 178341-0034?
The lug width of the Rolex Datejust 31 178341-0034 is 16 millimetres. This technical specification defines the distance between the two lugs on the case and determines the compatibility of any strap or bracelet. To verify, position a digital calliper perpendicular to the lugs: precise measurement is essential to avoid poor strap fit.
What strap material do you recommend for the Datejust 31 178341-0034?
For this two-tone watch with mother-of-pearl dial, alligator leather represents the optimal choice: its regular grain and suppleness enhance the case's elegance. Valid alternatives include vegetable-tanned calf (which develops patina over time) and shell cordovan for those preferring durability and moisture resistance. Recommended colours are dark brown, black, and burgundy.
How do you change the strap on a Rolex Datejust 31?
The strap is removed by working the lug pins (metal rods connecting the strap to the case). Using a spring bar tool, gently press the internal spring to release the pin from one side, remove the old strap, then insert the new pin into the opposite lug and release the spring. A straightforward operation, though professional installation at an authorised Rolex dealer or experienced craftsman is recommended to avoid damage.
Is a quality aftermarket strap compatible with the 178341-0034?
Yes, provided it respects the 16mm lug width specification. Artisanal straps manufactured to this specification fit perfectly into the original case. Quality depends on the maker: certified leathers, double stitching, refined finishes, and stainless steel pins ensure durability and aesthetic compatibility. Specialist brands such as Casati Milano offer construction standards that rival Rolex factory straps.
What is the average lifespan of a leather strap on a Datejust 31?
A high-quality leather strap (alligator, shell cordovan, vegetable-tanned calf) typically lasts between 3 to 5 years with moderate daily use. Factors affecting longevity include: frequency of wear, sun exposure, water and moisture contact, and preventative care (periodic cleaning, conditioning). An alligator strap, if protected from extremes, may last up to 7 years. Casati Milano's warranty covers manufacturing defects for 18 months from receipt.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only