TAG Heuer · Formula 1

Strap for Formula 1 Chronograph Quartz Stainless Steel / Red Bull

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
ReferenceCAZ101AK.BA0842
FamilyFormula 1
MovementRonda caliber 5040.D Hours, Minutes, Small Seconds | Date | Chronograph
CaseAluminium, 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 CAZ101AK.BA0842

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Formula 1 CAZ101AK.BA0842, seen from the bench

The TAG Heuer Formula 1 reference CAZ101AK.BA0842 is equipped with the Ronda quartz caliber 5040.D with hour, minute, small seconds, date and chronograph functions. The watch features 21.50mm lugs and belongs to the Swiss brand's sports collection. The caliber offers quartz precision with an integrated chronograph complication.

Frequently asked questions

What is the exact lug width of the TAG Heuer Formula 1 CAZ101AK.BA0842?

The lug width of the TAG Heuer Formula 1 CAZ101AK.BA0842 is 22 mm. This measurement is taken from the inner edge of one lug to the other, excluding the case circumference. A compatible strap must have an external width of 22 mm to fit correctly without play or excessive tension.

Which strap would you recommend for the TAG Heuer Formula 1 CAZ101AK.BA0842?

The TAG Heuer Formula 1 CAZ101AK.BA0842, with its stainless steel and aluminium case, pairs ideally with straps in Tuscan calf leather with vegetable tanning (pronounced grain, natural aging), black or brown alligator (sophisticated patina), or cotton canvas NATO for technical-sporting use. Your choice depends on the context: formal, daily wear or actively sports-oriented.

How do I change the strap on the TAG Heuer Formula 1 CAZ101AK.BA0842?

Remove the watch from your wrist. Locate the spring bars at the ends of the current strap—these are small horizontal metal pins. Use a dedicated spring bar tool or a thin lever to compress the spring and slide it out from one side, then repeat on the other side. Position the new 22 mm strap and reinsert both springs, confirming they click into place. Avoid forcing to prevent damaging the lug holes.

Is there an aftermarket strap compatible with the CAZ101AK.BA0842?

Yes, any strap with a 22 mm lug width is compatible with the TAG Heuer Formula 1 CAZ101AK.BA0842. MilanoStraps offers a complete collection of artisanal 22 mm straps in Tuscan leather, alligator, shell cordovan and technical materials. The Casati Milano atelier also creates bespoke solutions with personal leather selection and customisations (initials, stitching thread, deployante buckle).

How long does a natural leather strap last on a chronograph like the Formula 1?

A natural leather strap with vegetable tanning typically lasts 3–5 years with daily use, varying according to frequency, climate and care. The leather ages visibly, developing a richer patina. A quality artisanal alligator strap can last 5–7 years whilst maintaining better structural rigidity. Technical rubber and cotton NATO offer superior durability but less aesthetic versatility. Casati Milano's warranty is 18 months on all bespoke straps.

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.

Request an appointment →

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