IWC
Big Pilot IW5026-21— lug 20mm

The IWC Big Pilot IW5026-21 features a 20mm lug width. This measurement is structural for sports and aviation models: it represents the optimal compromise between strap robustness, necessary to support a 46.20mm case, and balanced visual proportions. To verify strap compatibility, measure the distance between the spring bars located under the case: the value in millimeters corresponds to the required width.

The choice of the best strap depends on use and desired aesthetics. For formal elegance we recommend dark brown alligator leather or black calf: both create sophisticated contrast with the Big Pilot's black dial. For sports or environmental use, a navy Cordura cotton NATO echoes aeronautical origins while maintaining functionality. For humid environments or intensive use, vulcanized FKM rubber does not absorb water and maintains flexibility in extreme conditions. Each material transforms the visual identity of the watch: leather adds warmth, NATO offers tactical purity, rubber brings contemporary sportiness.

Changing the strap requires minimal tools: a thin screwdriver or dedicated tool to lift the spring bar caps. Position the watch on a soft surface to avoid case damage. Once you locate the first spring bar, gently insert the tool into the small hole under the case to snap the bar upward. Once the bar is extracted, the strap separates from the case. Repeat the operation on the other side. To install the new strap, insert both bars through the lugs and ensure they snap into their housings. If you prefer to avoid the risk of damaging the case, Casati Milano offers the strap change service at the atelier by appointment.

Yes, the Big Pilot IW5026-21 with 20mm lugs is compatible with many quality aftermarket straps: the 20mm size is standard for sports and aviation watches. Online at milanostraps.it you will find a wide selection of <a href="https://milanostraps.it/collections/cinturini-orologi-per-misura-ansa-20mm">20mm straps</a> in alligator leather, calf, NATO, vulcanized rubber, all ready to ship and customizable in sizes, initials and choice of stitching thread. The bespoke alternative is Casati Milano atelier, which creates made-to-measure straps with direct choice of leathers and 18-month warranty.

The lifespan of a leather strap depends on intensity of use, environmental conditions, and the quality of leather construction. A well-made chromium-tanned or vegetable calf, worn regularly (4-5 days a week), maintains structural and aesthetic integrity for 3 to 5 years before showing significant signs of wear. Alligator, with its more robust structure, tends to last slightly longer. Moisture and sweat accelerate aging, while direct sun exposure causes fading and stiffening. A quality leather strap develops natural patina over time, adding character. Casati Milano offers an 18-month warranty on all artisanal straps, covering construction defects and providing support during the initial break-in period of the leather on your wrist.