Chopard
Classic Racing 178511-3001— lug 20mm

The Chopard Classic Racing 178511-3001 features a lug width of 20 mm. This dimension represents the internal space between the lugs (the protrusions of the case) and is the fundamental parameter for selecting a compatible strap. You can verify this by measuring with a calliper the distance between the lugs at the point closest to the dial.

For the 178511-3001, we recommend straps in alligator with straight grain or vegetable-tanned calfskin, which respect the sport-oriented design of the model. Dark brown or black alligator creates aesthetic synergy with the steel case, while cognac calfskin generates warm chromatic dialogue. For intensive daily use, NATO or high-density rubber straps are contemporary options that do not compromise legibility.

The replacement requires the use of a spring bar tool. Locate the small holes on the internal sides of the lugs, insert the tool to compress the spring bar's coil and extract the old strap. Repeat the operation from the opposite side. Finally, insert the new strap by pushing the ends of the spring bar into the holes until they click. If you are unfamiliar with this procedure, Casati Milano offers the change service at the atelier by appointment.

Yes, provided they respect the 20 mm lug width. On milanostraps.it you will find a collection of artisanal straps that are compatible, available in premium materials such as alligator, vegetable-tanned calfskin, NATO and rubber. All straps are customisable in size, initials and thread colour.

A quality artisanal alligator or calfskin strap has an average lifespan of 5-7 years of regular use, with peaks up to 10 years if subjected to periodic maintenance. Longevity depends on conditions of use (exposure to humidity, perspiration, UV rays) and daily care. Casati Milano guarantees straps for 18 months and offers restoration and reconditioning services.