TAG Heuer · Aquaracer

Strap for Aquaracer 300M Alarm 41 Stainless Steel / Silver / 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
ReferenceWAP111Y.BA0831 (aka: WAP111YBA0831, WAP111Y)
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 WAP111Y.BA0831 (aka: WAP111YBA0831, WAP111Y)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Aquaracer WAP111Y.BA0831 (aka: WAP111YBA0831, WAP111Y), seen from the bench

The Aquaracer features the Ronda 4120.B quartz caliber with hour, minute, small seconds, big date and alarm functions. This model presents sporty characteristics within the Swiss brand's dive watch collection. The reference WAP111Y.BA0831 identifies this specific configuration of the Aquaracer line.

Frequently asked questions

What is the lug width of the TAG Heuer Aquaracer WAP111Y.BA0831?

The lug width is 20 millimetres. This dimension is measured between the two horizontal attachments on the case, at the 12 and 6 o'clock positions. All compatible straps must respect this tolerance to ensure a smooth fit without forcing.

What is the best strap for the TAG Heuer Aquaracer WAP111Y.BA0831?

There is no single best choice; it depends on use case. For formal contexts, alligator leather with natural patina offers elegance without compromise. For aquatic environments, vulcanised rubber remains the technical reference: it does not absorb moisture and dries rapidly. Vegetable-tanned leather provides a patina that evolves over time, enriching the sportive aesthetic of the case.

How do you replace the strap on a TAG Heuer Aquaracer WAP111Y.BA0831?

Use a spring bar remover (tool with a bifurcated tip) to gently lift the horizontal pins securing the strap to the case lugs. Insert the tip of the remover into the groove beneath each lug, then extract the pin. Work one side at a time to avoid twisting the case. Install the new 20mm strap by aligning the terminals with the recesses on the lugs and reinserting the pins until they click into place.

Which aftermarket straps are compatible with the TAG Heuer Aquaracer WAP111Y.BA0831?

All straps with a 20mm lug width are compatible with the WAP111Y.BA0831, regardless of material: leather (alligator, calf, shell cordovan), rubber, NATO fabric, stainless steel. Always verify that the terminals fit smoothly into the case attachments without lateral play.

How long does a leather strap last on a TAG Heuer Aquaracer?

The lifespan of a leather strap depends on intensity of use and exposure to water and humidity. With standard maintenance (air-drying after saltwater contact, conditioning every 6-12 months), a calf or alligator strap lasts 3-5 years. Vegetable-tanned leather develops a patina that masks ageing. For an Aquaracer frequently used in water, vulcanised rubber remains the most durable choice.

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