Hublot · Classic Fusion

Strap for Classic Fusion 33 King Gold / Blue / Alligator

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

Lug width20 mm
Case diameter38 mm
Reference581.OX.7180.RX
FamilyClassic Fusion
MovementHublot caliber HUB1110 Hours, Minutes, Seconds | Date
CaseRed Gold, Resin

Spring bar

Swiss Standard universal spring bars

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

Straps for the Classic Fusion 581.OX.7180.RX

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Classic Fusion 581.OX.7180.RX, seen from the bench

The Hublot Classic Fusion 581.OX.7180.RX features a 38mm case in 18k red gold and resin, combining precious metal with structural lightness—a signature material dialogue of the Nyon Maison. The case houses the HUB1110 automatic calibre, delivering hours, minutes, central seconds and date. The 20mm lug width is native to this reference and requires verification before purchasing aftermarket straps. The red gold interacts with satin and polished surfaces in light-reactive tones, while the resin absorbs impacts and reduces perceived weight without diminishing the piece's luxury character.

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