Strap for Datejust 31 Rolesor Everose Domed / Oyster / Pink Computer

The Rolex Datejust 31 reference 178241-0012 features a lug width of 16.00 mm. This measurement is specific to the 31 mm Datejust case and proportioned to maintain the original aesthetic balance. To verify compatibility of an aftermarket strap, measure the internal distance between the case lugs with a calliper: it must be exactly 16 mm.

For the Datejust 31 178241-0012 Rolesor (Everose and steel), straps in alligator, boxed calf or vulcanised rubber are recommended. Nile alligator in cognac, brown or black tones creates an elegant dialogue with the Everose gold. Vegetable-tanned calf develops a patina over time that reflects the ageing of the case. Rubber is ideal for sports and humid use. Avoid undersized straps (15.5 mm) that may stress the lugs.

The Datejust 31 178241-0012 is fitted with straight bar lugs. To change the strap: (1) position the watch face up; (2) use a spring bar tool or small flathead screwdriver to gently push the bar from the side you wish to remove; (3) extract the bar and unfasten the old strap; (4) insert the new strap aligning it with the hole, then reinsert the bar until it clicks. Do not force: if the bar does not enter smoothly, the strap is not exactly 16 mm.

Yes, quality aftermarket straps are fully compatible. It is essential to verify that they have a 16 mm lug width and straight bar attachments to align with the Rolex case lugs. Milano Straps supplies artisanal leather and rubber straps certified for this measurement. The use of aftermarket straps does not void the Rolex guarantee on the case and movement, provided the original lugs are not altered.

A quality leather strap (alligator or boxed calf) lasts on average 7–10 years with moderate use (4–5 days per week). Longevity depends on tanning type, exposure to moisture and frequency of wear. Vegetable-tanned leather develops a patina but remains structurally intact longer. To extend useful life, avoid prolonged contact with salt water or chlorine. Milano Straps provides an 18-month warranty on manufacturing defects.