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TAG Heuer · Aquaracer

Strap for TAG Heuer Aquaracer CAY1111.BA0927

The Aquaracer 300M Quartz Chronograph 43 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 width

20mm
20 mm strapsAll TAG Heuer
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Lug width20 mm
Case diameter43 mm
ReferenceCAY1111.BA0927 (aka: CAY1111BA0927, CAY1111)
FamilyAquaracer
MovementRonda caliber 5040.B Hours, Minutes, Small seconds | Big date | Chronograph
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

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What I'm asked about the TAG Heuer Aquaracer CAY1111.BA0927

What strap size does the TAG Heuer Aquaracer CAY1111.BA0927 take?

The TAG Heuer Aquaracer CAY1111.BA0927 needs 20 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 Aquaracer CAY1111.BA0927 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 Aquaracer CAY1111.BA0927?

Yes, in 20 mm leather, as long as you don't wear it in the water: leather doesn't like the sea or the pool. For days in the water, rubber. On a 43 mm diver I go for a full-thickness strap, not a thin one.

Which strap do you recommend for the TAG Heuer Aquaracer CAY1111.BA0927?

Rubber if you wear it in the water; otherwise a 20 mm calf strap, full thickness. You'll find it ready in the 20 mm collection. If you'd rather have something built on your wrist, the Casati atelier.

Straps for the Aquaracer CAY1111.BA0927

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Aquaracer CAY1111.BA0927, seen from the bench

The Aquaracer CAY1111.BA0927 is a sports chronograph from TAG Heuer's diving collection. It features the Ronda quartz calibre 5040.B with hour, minute, small seconds, big date and chronograph functions. The case has a robust construction suitable for underwater use according to the Aquaracer line standards.

Frequently asked questions

Which strap is best for the TAG Heuer Aquaracer CAY1111.BA0927?

There is no universally "best" strap, as the choice depends on intended use. For authentic sporting character, we recommend vulcanised rubber with waffle or diamond texture, which maintains the Tool Watch identity. Alligator leather in deep brown or hazel offers controlled elegance whilst maintaining coherence with the case's brushed finish. For versatility, a robust nylon NATO strap allows rapid changes. Vegetable-tanned calf in cognac or steel grey is ideal if you seek balance between sportiness and refinement. All 20mm lugs width straps are compatible with this model.

Is there a quality aftermarket strap compatible with the CAY1111.BA0927?

Yes. Any strap with 20mm lug width is compatible with the TAG Heuer Aquaracer CAY1111.BA0927. Milano Straps offers handcrafted leather straps in premium quality (alligator, calf, shell cordovan, vegetable-tanned leather), robust nylon NATO straps and vulcanised rubber. All are customisable in size, colour and stitching. Casati Milano atelier also creates bespoke straps with direct consultation, allowing personal selection of leathers and WhatsApp updates, with 18-month warranty.

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

Leather strap durability depends on material, frequency of use and care. Quality handcrafted alligator or shell cordovan, with proper maintenance, lasts 3-5 years in daily use. Vegetable-tanned calf, being more porous, tends to show patina after 18-24 months but remains functional for 2-3 years. Vulcanised rubber is more durable (4-7 years) as it does not suffer from sweat and water exposure like leather. To extend strap lifespan, we recommend: drying the watch after water exposure, avoiding prolonged direct sunlight, occasionally applying natural leather conditioner. Milano Straps guarantees 18 months on all handcrafted 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.

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

The atelier's website: casatimilano.com