Rolex · Datejust 31
Strap for Datejust 31 Stainless Steel / Yellow Gold / Domed / Grey - Diamond / Jubilee
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 278243-0022
Selected for the 16 mm lug width
The Datejust 31 278243-0022, seen from the bench
Frequently asked questions
What is the lug width of the Rolex Datejust 31 278243-0022?
The lug width of the Rolex Datejust 31 reference 278243-0022 is 16 millimetres. This measurement is critical for selecting a compatible strap: a 16mm strap will fit perfectly into the case lugs, whilst smaller sizes (14mm) or larger ones (18mm) will not align correctly. To verify the lug width, use a digital calliper to measure the distance between the internal attachment points on the case.
Which strap is most recommended for the Rolex Datejust 31 278243-0022?
For the two-tone Datejust 31 278243-0022, vegetable-tanned alligator remains the classic choice: its natural texture and the patina it develops over time harmonise perfectly with the yellow gold and Oystersteel combination. Alternatively, vegetable-tanned calf leather in dark blue or burgundy offers a more elegant and contemporary appearance. For those seeking versatility, a rubber or NATO strap transforms the Datejust into a reliable sports watch. Shell cordovan, when available in 16mm, represents the premium choice for durability and aesthetic appeal.
How do you change the strap on a Rolex Datejust 31?
Changing the strap on a Rolex Datejust requires appropriate tools and careful handling. Use a spring bar tool to remove the spring bars holding the old strap to the case lugs. Position the tool under the spring, apply gentle pressure and the pin should release. Next, insert the new strap in the same manner, ensuring both spring bars are correctly seated. If you lack experience, entrust the operation to a professional: the risk of scratching the gold case is considerable for those without technical skill.
Is an aftermarket strap compatible with the Rolex Datejust 31 278243-0022?
Yes, any strap with a 16-millimetre lug width is compatible with the Rolex Datejust 31 278243-0022. However, the construction quality of the aftermarket strap determines user experience: budget straps feature inferior leather and fragile stitching, compromising the visual integrity of your Rolex. Artisanal straps of quality—crafted from genuine alligator, vegetable-tanned calf or shell cordovan—maintain the aesthetic standard of your Datejust, transforming the strap into a lasting investment.
How long does a leather strap last on a Rolex Datejust 31?
The lifespan of a leather strap depends on material, frequency of wear and care. A quality alligator or calf strap, worn daily, has an average lifespan of 4-6 years before showing significant deterioration. Factors such as sun exposure, humidity and perspiration accelerate wear. A vegetable-tanned shell cordovan strap, with the same frequency of use, can exceed 8-10 years thanks to its superior resilience. To maximise longevity, rotate multiple straps, protect them from excessive moisture and subject them to periodic cleaning with leather-specific products.
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

