Strap for Formula 1 Chronograph Quartz 42 Stainless Steel / Black / Bracelet

The lug width of the TAG Heuer Formula 1 CAZ1110.BA0877 is 20mm. This measurement represents the internal distance between the two lugs of the case and is essential for identifying compatible watch straps. To verify it, measure the internal space between the horns: it must be exactly 20mm. This specification is standardised across all contemporary Formula 1 models.

For the Formula 1 CAZ1110.BA0877, we recommend alligator leather with vegetable tanning, which combines elegance and sports durability through pronounced grain and the ability to develop rich patina over time. Alternatively, vintage-washed calf offers a more urban aesthetic and resilience, whilst shell cordovan represents the choice of maximum longevity for those seeking a material that improves with age. For tactical use, vulcanised black rubber is practical and maintains motorsport character.

The change requires removing the integrated bracelet through the lugs. Position the watch with the caseback facing up and identify the lug holes: using a flat tool (such as a strap removal bar or small screwdriver), gently push inward to release the lugs from the groove. The new 20mm strap must be inserted with millimetre precision into the same slot. If you prefer not to operate independently, Casati Milano offers a strap-changing service in the atelier.

Yes, any strap with a 20mm lug width is mountable, provided it respects the dimensional tolerances of the case. However, generic straps may not adhere perfectly to the specific grooves of the TAG Heuer case. Bespoke straps from Casati Milano are produced to the exact tolerances of your case, guaranteeing smooth assembly and perfect alignment with the crown.

Durability depends on the material and usage: alligator with vegetable tanning resists 3–4 years with moderate daily use; calf lasts 2–3 years; shell cordovan can exceed 5–6 years because denser fibre resists repeated flexing. Exposure to sweat, salt water and humidity variations reduces longevity. Casati Milano provides 18 months warranty on all straps, covering manufacturing defects and stitching.