Strap for Datejust 31 Rose Gold / Fluted / MOP / President

The Rolex Datejust 31 reference 278275-0009 is fitted with a 16-millimetre lug width. This measurement is specific to the 31mm Datejust models and differs from the 20mm width found on 36 and 40-millimetre Datejust variants. The lug width represents the distance between the inner shoulders of the spring bar hole and is essential for correct strap compatibility with the case.

Vegetable-tanned alligator represents the optimal choice: it offers extraordinary durability, develops a fascinating patina over time, and harmonises perfectly with the rose gold Everose case. Alternatively, shell cordovan creates a tactile and visual effect of considerable aesthetic impact. For sporting contexts, vulcanised rubber or a cotton NATO strap maintains functionality without compromising the model's inherent elegance.

To change the strap, you require the original Rolex spring bars (straight bars of 16mm width) and a small pin removal tool. Position the watch on a stable surface, gently lever out the spring bar from one side, remove the worn strap, align the new strap's apertures with the case lugs, and finally reinsert the spring bar. The operation takes 2-3 minutes for those with experience; professional assistance is advisable to prevent case damage.

Standard generic 16mm aftermarket straps are not recommended. Although the lug width is technically 16mm, quality aftermarket straps must be specifically tailored or cut for this model regarding shoulder details and finishing. A bespoke leather strap guarantees correct fit, eliminates play, and ensures aesthetic coherence with the watch's inherent nobility.

A quality alligator strap, with daily wear and regular maintenance, has an average lifespan of 4-6 years before replacement is required. Shell cordovan may last 7-8 years thanks to its natural hardness. Aniline calf has a shorter life, typically 2-3 years, dependent on ambient humidity and frequency of use. Periodic maintenance—gentle cleaning, prompt drying after moisture exposure, and application of specific conditioning products—significantly extends longevity.