Hublot · Classic Fusion
Hublot Classic Fusion Chronograph 45 mm
Reference 521.CM.1171.RX · Chronograph · 45 mm
Specifications
- Reference
- 521.CM.1171.RX
- Family
- Classic Fusion
- Category
- Chronograph
- Status
- Current
- Case material
- Ceramic
- Case diameter
- 45 mm
- Case thickness
- 13.4 mm Third-party
- Lug-to-lug
- 53.8 mm Third-party
- Lug width
- —
- Water resistance
- 50 m
- Bezel
- —
- Calibre
- HUB1143 Official
- Power reserve
- about 48 h
Official product page · retrieved October 20, 2026
Does it fit your wrist?
Enter your wrist circumference. The watch appears to scale on the flat top of the wrist.
At the limit
Lug-to-lug 53.8 mm on a flat top of 54.1 mm: 100 % of the width.
Lug-to-lug is 95 to 100% of the flat top. The lugs reach the edge, so check your wrist shape.
Measurements and sources
Brands rarely publish thickness, lug width and lug-to-lug together. Each observation below is kept separate, with who gave it.
Case thickness
| Value | Type | Source | Date |
|---|---|---|---|
| 13.4 mm | Third-party | The 1916 Company Hublot publishes no thickness for this case; the review that gives the lug-to-lug reads "measures 13.4mm in thickness and 53.8mm from lug-to-lug". | October 25, 2026 |
Lug-to-lug
| Value | Type | Source | Date |
|---|---|---|---|
| 53.8 mm | Third-party | The 1916 Company Review titled "Hublot Classic Fusion Chronograph Black Magic 521.CM.1171.RX": "measures 13.4mm in thickness and 53.8mm from lug-to-lug". Median of 2 reviews of this case. | October 25, 2026 |
Lug width
Lug width is the gap between the lugs, where the strap fits. It is not lug-to-lug.
No source gave this figure yet.
Calibre source
Official Hublot · retrieved October 20, 2026
Other versions in the same case
These references differ only by dial, bracelet or bezel colour. The brand gives them the same case dimensions, so the figures on this page apply to them too.
- 521.CM.7170.RX · Ceramic Blue
- 521.CO.1181.RX · Ceramic King Gold
Other Classic Fusion references
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Classic Fusion Aerofusion 45 mm 525.NX.0170.RX | 45 mm | 13.6 mm | 53.5 mm | HUB1155 |
| Classic Fusion Chronograph King Gold 45 mm 521.OX.1181.RX | 45 mm | 13.6 mm | 53.4 mm | HUB1143 |
| Classic Fusion Chronograph Titanium 45 mm 521.NX.1171.RX | 45 mm | 13.6 mm | 53.4 mm | HUB1143 |
| Classic Fusion Chronograph Titanium 42 mm 541.NX.1171.RX | 42 mm | 12 mm | 50.5 mm | HUB1153 |
Other Hublot models
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Big Bang Meca-10 King Gold 45 mm 414.OI.1123.RX | 45 mm | 15.7 mm | 57.2 mm | HUB1201 |