TAG Heuer · Aquaracer

Strap for Aquaracer 300M Alarm 41 Stainless Steel / Black / Bracelet

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter41 mm
ReferenceWAP111Z.BA0831 (aka: WAP111ZBA0831, WAP111Z)
FamilyAquaracer
MovementRonda caliber 4120.B hours, minutes, small seconds | big date | alarm
CaseStainless 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 Aquaracer WAP111Z.BA0831 (aka: WAP111ZBA0831, WAP111Z)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Aquaracer WAP111Z.BA0831 (aka: WAP111ZBA0831, WAP111Z), seen from the bench

The TAG Heuer Aquaracer WAP111Z.BA0831 is a 41mm stainless steel sports watch from the iconic collection that redefined Swiss waterproof standards. It features a unidirectional ceramic bezel, a Ronda 4120.B quartz movement with hours, minutes, small seconds, date, and alarm functions, and 300-meter water resistance. The integrated lug design ensures structural rigidity, and the 20mm lug width is standard for this compact-sports model. AISI 316L stainless steel resists marine corrosion without special maintenance, while the anti-reflective sapphire crystal protects the dial.

Frequently asked questions

What is the lug width of the TAG Heuer Aquaracer WAP111Z.BA0831?

The TAG Heuer Aquaracer WAP111Z.BA0831 features a 20-millimetre (20mm) lug width. This measurement is taken from the inside distance between the two attachment pins. It is essential to verify this specification before purchasing an aftermarket strap to ensure perfect compatibility with your timepiece. Milano Straps provides visual guides to measure correctly.

Which strap is most suitable for the TAG Heuer Aquaracer WAP111Z.BA0831?

For this 41mm sports model, we recommend vegetable-tanned alligator (cognac or dark brown) for those seeking luxury with character, or grained black calf for formal-sporty versatility. If the watch will frequently contact salt water, vegetable rubber or technical textiles offer rapid drying and minimal maintenance. The Casati Milano atelier personalises your choice based on your style and usage habits.

How do you change the strap on the TAG Heuer Aquaracer WAP111Z.BA0831?

The Aquaracer WAP111Z.BA0831 features an integrated lug with standard spring-bar attachments. To change the strap: (1) obtain a spring bar tool; (2) gently press the lateral pin to release the strap; (3) insert the new strap ensuring the pin clicks securely on both sides. If uncertain, the Casati Milano atelier offers strap-change service by appointment.

What is the best aftermarket strap for the TAG Heuer Aquaracer WAP111Z.BA0831?

Milano Straps' 20mm artisanal straps combine rigorous hide selection, hand stitching and professional finishing. Natural alligator with vegetable tanning ages beautifully; shell cordovan develops a deep patina; grained calf remains practical for marine environments. Defining quality is durability: Milano Straps guarantees 18 months on straps personalised at the Casati atelier.

How long does a leather strap last on the TAG Heuer Aquaracer WAP111Z.BA0831?

A quality artisanal leather strap lasts 3–5 years with routine care (avoid prolonged soaking, dry after salt water, avoid excessive flexing). Vegetable-tanned leather ages beautifully, developing character over time. Rubber or technical textile straps last 2–3 years. Wear depends on frequency of use and environmental conditions. Milano Straps offers regeneration services and pin replacement to extend the life of your piece.

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