Strap for Formula 1 x Senna

The lug width of the TAG Heuer Formula 1 CAZ101AF.BA0637 is exactly 20mm. This width is standard across all Formula 1 models of this generation and is proportioned to the 43mm case diameter. Measurement must be taken from the inner edge of one lug to the inner edge of the other lug, perpendicular to the case plane.

For the CAZ101AF.BA0637, alligator leather is the most refined choice due to its exceptional durability and natural grain texture reminiscent of race car aesthetic. Rubber is the most authentic solution aligned with the watch's motorsport DNA, offering grip and tactical functionality. Vegetable-tanned calf is the most versatile option, developing a rich patina over time. NATO straps are discouraged as they visually diminish the substantial 43mm case proportions.

Strap replacement requires a spring bar removal tool. Position the tool perpendicular to the spring bar, apply gentle pressure toward the case centre to release the spring tension, then extract the bar. Repeat for the opposite lug, taking care not to scratch the ceramic or steel case surfaces. Installation of the new strap follows the reverse procedure, ensuring the spring bar engages fully in both lugs.

Yes, any standard 20mm lug width strap is compatible with the CAZ101AF.BA0637, provided it features quality construction (curved lugs, precise stitching, durable materials). Milano Straps offers a curated selection of 20mm straps customisable for this model, in alligator, calf, rubber, and shell cordovan options. Atelier Casati Milano can create bespoke custom straps with personalised specifications including embroidery and thread colour selection.

Leather strap longevity depends on material quality, usage intensity, and maintenance. Alligator or shell cordovan straps can last 5-10 years with moderate daily wear. Vegetable-tanned calf develops exceptional patina over 3-5 years and maintains functionality for 7-8 years. Rubber offers maximum longevity (10+ years) but requires regular cleaning. Casati Milano provides an 18-month guarantee on all bespoke straps, covering manufacturing defects and premature deterioration.