Hublot · Classic Fusion

Strap for Classic Fusion 45 Aerofusion Chronograph Black Magic

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

Lug width20 mm
Case diameter45 mm
Reference525.CM.0170.RX
FamilyClassic Fusion
MovementHublot caliber HUB1155 Hours, Minutes, Small Seconds | Date | Chronograph | Skeleton
CaseCeramic, 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 525.CM.0170.RX

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Classic Fusion 525.CM.0170.RX, seen from the bench

The Classic Fusion represents one of Hublot's main lines, characterized by a design that combines classic and contemporary elements. The reference 525.CM.0170.RX is equipped with the automatic HUB1155 caliber with chronograph, small seconds, and date functions. The movement has a skeletonized architecture that makes the mechanical components visible through the dial.

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