Item number: 7455
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The FSA Duron X is a silver 1" headset for Italian thread forks (22.2 x 30.2/26.4 mm).

Use:
for 1" up and lower head tubes combined with standard 1" forks.

Specifications:

Application:
Road, Cross Country, City
Top Cup:
1"
Bottom Cup:
1"
Pitch:
24 tpi
Steerer Tube:
1"
Design:
external cup (EC)

Technical Information:

Material:
aluminium
Bearings:
Angular contact ball bearings (36°/ 36° ACB, top)
Upper Insert Depth:
10 mm
Lower Insert Depth:
10 mm
Top Stack Height:
27.5 mm
Bottom Stack Height:
13.1 mm
Top Outer Diameter:
30 mm
Top Inner Diameter:
25.4 mm
Bottom Outer Diameter:
30 mm
Bottom Inner Diameter:
26 mm
Seals:
Black Seal

Features:

  • forged and CNC-fabricated bearing cups
  • aluminium threaded nut
  • total stack height: 40.6 mm

Standardized Headset Identification System (S.H.I.S.):

In order to clarify and bring uniformity to a sea of headset standards, manufacturers Acros, Cane Creek, Hope, Race Face, Reset Racing and Ritchey have agreed upon using a shared nomenclature, which will likely include more participating companies in the future. This system takes into account a combination of frame and fork dimensions. Both the top and bottom parts of the headset are marked by two alphanumeric identifiers. The first identifier indicates the type of headset (External Cup, Zero Stack, Integrated) and head tube diameter. The second identifier - separated from the first by a backslash - indicates the diameter of the steerer tube. When referring to a complete headset, the specifications of both top and bottom parts must be combined.

Nomenclature:

EC:
Bearings contained within headset cups that are located outside of the frame (External Cup)
ZS:
Bearings contained within pressed-in headset cups where the cup and bearings rest inside the frame (Zero Stack)
IS:
Bearings that fit directly into a bonded or machined interface that is integrated into the frame (Integrated)

Manufacturer Number:

EC30/25.4 - EC30/26:
121-1400

Contents:

  • 1 x FSA Duron X top headset cup incl. bearings
  • 1 x FSA Duron X bottom headset cup incl. bearings
  • 1 x nut
  • 1 x crown race


Weight:

  • silver/EC30/25.4 - EC30/26: 94 g

Models:

  • silver/EC30/25.4 - EC30/26, out of stock
    51.92€

Customer Reviews (1)

5

Customer Reviews (1)

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by Vincent v.  on 14.03.2023
verified purchase

The sealed bearing type headset is way more sturdy than an open roller bearing style. If your threaded fork can manage the extra stack height, this is wel worth the upgrade. The FSA's stack height is bigger than the older types you find on vintage road bikes.

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