Breitling · Exospace

Strap for B55 Exospace Yachting Titanium / Carbon / TwinPro Blue / Folding

Takes 24 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width24 mm
Case diameter46 mm
ReferenceEB5512221B1S1 (aka: EB551222.BG45.235S)
FamilyExospace
MovementBreitling caliber Caliber B55 Additional 24 Hour Hand (adjustable), Hours, Minutes, Seconds | Date, Day, Month, Perpetual Calendar, Year Indicator | Chronograph, Countdown, Flyback, Rattrapante | Alarm | Chronometer, Power Reserve Indicator, Connected
CaseTitanium

Spring bar

Swiss Standard universal spring bars

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

Straps for the Exospace EB5512221B1S1 (aka: EB551222.BG45.235S)

Selected for the 24 mm lug width · workshop selection

All 24 mm straps →

The Exospace EB5512221B1S1 (aka: EB551222.BG45.235S), seen from the bench

The Exospace is a Breitling multi-function chronograph equipped with the B55 caliber, a SuperQuartz movement with smartphone connectivity. The timepiece offers advanced chronograph functions including flyback and split-seconds, perpetual calendar, and adjustable 24-hour display. The 24mm lug case integrates a two-way communication system with mobile devices.

Frequently asked questions

What is the lug width of the Breitling Exospace EB5512221B1S1?

The Breitling Exospace EB5512221B1S1 features a lug width of 24mm. This measurement is standard across the Exospace line and is engineered to provide optimal stability on medium to robust wrists. Always verify the lug width before purchasing an aftermarket strap, as even a 1-2mm discrepancy will prevent proper seating on the case lugs.

Which strap material is best suited for the Exospace EB5512221B1S1?

As a professional aviator's instrument, the Exospace pairs exceptionally well with crocodile leather or robust calf leather, as well as ballistic nylon NATO and technical rubber options. Crocodile offers natural flexibility and develops an attractive patina over time; fine-grain calf maintains tactile legibility even when wearing gloves. NATO straps in ballistic nylon provide operational versatility. Your choice depends on context: civil aviation favours crocodile leather, whilst tactical missions prefer rubber or NATO configurations.

How do I change the strap on the Breitling Exospace EB5512221B1S1?

The Exospace employs standard spring bar lugs. To remove the strap: 1) Position the watch on a soft surface; 2) Use a spring bar tool to release the bar tension; 3) Slide the bar laterally until it disengages; 4) Extract the worn strap. To install a new strap, reverse the procedure, ensuring the spring bar seats firmly in both lug holes. If unfamiliar with this process, entrust the job to Casati Milano's technicians.

Are 24mm aftermarket straps compatible with the Breitling Exospace EB5512221B1S1?

Yes, any strap manufactured with a 24mm lug width is compatible with the Breitling Exospace EB5512221B1S1, regardless of manufacturer. However, for superior construction quality and finish, we recommend artisanally crafted straps featuring hand-stitched seams, naturally tanned leathers, and robust deployante clasps. Milano Straps customises every strap to your specifications: leather selection, thickness, stitch colour, and personalised initials.

What is the expected lifespan of a leather strap on the Exospace EB5512221B1S1?

A handcrafted leather strap of premium quality will typically last 2–4 years with daily wear before requiring restoration. Occasional wear extends longevity to 5–7 years. Durability depends on leather type: crocodile and shell cordovan age gracefully and can be restored; calf leather requires regular conditioning with vegetable balms. Casati Milano offers an 18-month warranty on bespoke-crafted straps and maintains restoration services to extend strap lifespan indefinitely.

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