TAG Heuer · Formula 1

Strap for TAG Heuer Formula 1 WBY1111.BA0042

The Formula 1 Solargraph 38 Stainless Steel / White / Bracelet takes 19 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

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Lug width19 mm
Case diameter38 mm
ReferenceWBY1111.BA0042
FamilyFormula 1
MovementTAG Heuer caliber TH50-00 Hours, Minutes, Seconds | Date | Chronometer
Year2025
CasePolyamide, Stainless Steel

Spring bar

Swiss Standard universal spring bars

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

What I'm asked about the TAG Heuer Formula 1 WBY1111.BA0042

What strap size does the TAG Heuer Formula 1 WBY1111.BA0042 take?

The TAG Heuer Formula 1 WBY1111.BA0042 needs 19 mm between the lugs, usually 16 mm at the buckle. It's the size I've been fitting on it for years.

Can the strap on the TAG Heuer Formula 1 WBY1111.BA0042 be changed?

Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.

Can I put a leather strap on the TAG Heuer Formula 1 WBY1111.BA0042?

Yes, in 19 mm leather. On a 38 mm case a calf strap works every day; if you want something more, alligator.

Which strap do you recommend for the TAG Heuer Formula 1 WBY1111.BA0042?

A 19 mm calf strap, for every day. You'll find it ready in the 19 mm collection. If you'd rather have something built on your wrist, the Casati atelier.

Straps for the Formula 1 WBY1111.BA0042

Selected for the 19 mm lug width

All 19 mm straps →

The Formula 1 WBY1111.BA0042, seen from the bench

The TAG Heuer Formula 1 WBY1111.BA0042 is the contemporary interpretation of an icon born in 1986 from the Formula 1 paddock. This chronograph maintains the original model's sporting heritage while evolving with sophisticated materials and movements. The 38mm case in stainless steel 316L and high-resistance polymer represents the perfect balance between track-watch robustness and everyday elegance. Equipped with the TH50-00 caliber automatic movement with 42-hour power reserve, it features a clean dial, hours, minutes, seconds, and date window at 3 o'clock. Water-resistant to 100 meters, sapphire crystal, fixed bezel, and 19mm lug width.

Frequently asked questions

Which strap is most suitable for the TAG Heuer Formula 1 WBY1111.BA0042?

For the WBY1111.BA0042, we recommend alligator straps for maximum elegance, shell cordovan for multi-decade durability, vegetable-tanned leather for aesthetic evolution over time, or FKM rubber for sporting contexts. The absence of gold plating on the case renders this model versatile with various colour palettes. Avoid synthetic or canvas straps, which are technically inconsistent with the watch's construction quality.

Are aftermarket straps compatible with the TAG Heuer Formula 1 WBY1111.BA0042?

Yes, but with precise constraints. Only straps designed for 19mm lug width are suitable. We strongly discourage adapters or dimensional compromises, as they damage the case lugs and compromise structural fitment. Artisanal quality straps, custom-made or from standard 19mm production lines, guarantee perfect compatibility and aesthetic longevity.

How long does a leather strap last on the TAG Heuer Formula 1 WBY1111.BA0042?

Durability depends on tanning method and usage. Vegetable-tanned calf leather lasts 3–5 years with ordinary maintenance. Shell cordovan exceeds 10–15 years. Alligator can last 7–10 years. FKM rubber has an average lifespan of 5–7 years before losing elasticity. Factors such as sun exposure, humidity and wearing frequency significantly influence longevity. Casati Milano offers an 18-month warranty on all artisanal straps produced.

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

The atelier's website: casatimilano.com