TAG Heuer · Formula 1

Strap for Formula 1 Chronograph Quartz Stainless Steel / Signet

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter43 mm
ReferenceCAZ101R.BA0843
FamilyFormula 1
MovementRonda caliber 5040.D hours, minutes, small seconds | date | Chronograph
CaseCeramic, Stainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Formula 1 CAZ101R.BA0843

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Formula 1 CAZ101R.BA0843, seen from the bench

The TAG Heuer Formula 1 CAZ101R.BA0843 is a chronograph quartz watch born in 1986 for automotive environments. It features a 43mm stainless steel and black ceramic case with a 22mm lug width, sapphire crystal, and 300m water resistance. The Ronda 5040.D movement powers chronograph functions, small seconds, and date display, delivering precision certified by Swiss watchmaking standards.

Frequently asked questions

What is the lug width of the TAG Heuer Formula 1 CAZ101R.BA0843?

The lug width of the TAG Heuer Formula 1 CAZ101R.BA0843 is 22mm. This width is specific to Formula 1 models with a 43mm case and excludes compatibility with standard 20mm or 24mm straps. Precise measurement is critical to avoid structural play on the lugs.

Which strap is recommended for the TAG Heuer Formula 1 CAZ101R.BA0843?

For this bivalent case in black ceramic and stainless steel, black alligator remains the most elegant solution: natural grain, calibrated thickness, extraordinary aging with deep patina in 3-4 months. Alternatively, vegetable-tanned calf leather in cognac or burgundy tones creates striking visual contrast. For track use, vulcanised rubber or synthetic NATO straps ensure breathability and zero maintenance.

How do you change the strap on a TAG Heuer Formula 1?

Strap replacement follows standard procedure: position the watch on a soft surface (cloth), identify the spring bars at the ends of the strap, use a spring bar tool to gently compress the bar towards the centre of the case, then extract the bar from its seat. Repeat on the other side. Insert the new strap by aligning the holes with the spring bar seats and push until you hear an insertion click. Verify that the spring bar is fully locked on both sides before wearing.

Is there an aftermarket strap compatible with the CAZ101R.BA0843?

Yes. Any strap with a 22mm lug width is compatible. Artisanal leather straps (alligator, calf, shell cordovan) offer superior quality to serial straps: controlled thickness, hand-finished cut edges, customisation options (initials, stitching thread, custom length). Specialised online suppliers guarantee rapid shipping and try-on possibilities.

How long does a leather strap last on a TAG Heuer Formula 1?

A natural leather strap (alligator, vegetable-tanned calf, shell cordovan) lasts 4-6 years with daily use and standard maintenance (drying after wetting, no prolonged direct sunlight). Durability depends on intensity of use, climate and personal care. A synthetic NATO strap or vulcanised rubber lasts 8-10 years without aesthetic decay. Replacement becomes necessary when leather begins to flake or when the strap loses grip on the lugs.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only