Chopard
Classic Racing 168535-3002— lug 20mm

The Chopard Classic Racing 168535-3002 features a lug width (ansa) of 20mm. This measurement refers to the internal distance between the lug shoulders at the attachment point to the watch case. It is a critical dimension for aftermarket strap installation, as deviations of even 1mm (19mm or 21mm) cause instability and lateral play on the case.

Alligator leather with vegetable tanning represents the most aesthetically and functionally coherent choice: its irregular texture and the natural patina that develops over time emphasise the sporting character of the model. Valid alternatives include fine-grained calf leather for formal contexts and NATO-style synthetic fibre straps for daily heavy-use scenarios. For aquatic environments, FKM rubber ensures superior performance.

The strap is removed using a dedicated tool (spring bar tool) to push the anchor pins that connect the lugs to the case. The procedure requires delicacy to avoid damaging the case seats. It is recommended to work on a clean, well-lit surface, supporting the case with a soft pad. Installation of the new strap follows the reverse procedure: insertion of the pin into the strap holes, alignment with case references, and controlled pressure until full anchorage is achieved.

Yes, any strap with a 20mm lug width is compatible with the Chopard Classic Racing 168535-3002. It is essential to verify the exact width before purchase by consulting the manufacturer's technical specifications. The quality of construction—number of stitching points, needle type, pin finish—influences the durability and stability of the connection.

A quality alligator or calf leather strap, subjected to regular wear (5–6 days per week), maintains structural and aesthetic integrity for 3–4 years. The natural ageing of leather produces a gradual patina and, under certain humidity and light conditions, deeper colouration. Factors such as direct sun exposure, extreme thermal variations, and humid environments accelerate the degradation process. Periodic maintenance with natural oils extends the strap's functionality.