Strap for Formula 1 Chronograph x Indy 500

The TAG Heuer Formula 1 CAZ101AW.BA0842 features a lug width of 20mm, a standard measurement for medium to large sports watches in the Swiss manufactures' portfolio. To verify the width accurately, position a millimetre ruler perpendicular to the case plane at the point where the strap attachment occurs: the measurement should be taken from the inner top edge of the right lug to the inner top edge of the left lug.

The choice depends on intended use and desired aesthetic character. For an elegant style, we recommend natural alligator or shell cordovan with vegetable tanning; for aquatic environments or sporting activities, an FKM rubber or NATO fabric strap maintains original functionality. Vegetable-tanned calf leather is ideal if you wish for a natural patina to develop over time, transforming the watch into an increasingly personalised accessory.

Strap replacement requires a specific tool called a spring bar tool or bar removal device. Grip the strap and use the tool to gently compress the small horizontal metal bar (spring bar) that links the strap to the lugs. Once released, the original strap separates easily. Insert the new strap by aligning the holes with the lugs and compress the spring bar until it locks back into place. If unsure, Casati Milano atelier offers this service with professional warranty.

Yes, any strap with a 20mm lug width is compatible with the TAG Heuer Formula 1 CAZ101AW.BA0842, provided that the attachments are standard. Milan Straps offers a curated selection of 20mm straps in various materials (alligator, calf, rubber, shell cordovan) selected to guarantee perfect fit and artisanal quality, all customisable and with 18-month warranty through Casati Milano atelier.

The lifespan of a leather strap depends on frequency of use, exposure to moisture and leather quality. An artisanal-quality alligator or vegetable-tanned calf strap, worn daily, maintains full functionality for 3–5 years; with part-time use (2–3 times weekly), lifespan extends to 5–8 years. Shell cordovan, due to its structural hardness, lasts even longer. Casati Milano's 18-month warranty covers manufacturing defects, whilst natural wear can be managed through professional adjustment every 2–3 years.