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FSA Xtreme Pro Lower Headset
Select options to see availability
What the stock status means
- In stock On the shelf in our own warehouse. Order before 2pm and it is despatched the same working day; bikes we build are built, safety-checked and despatched in 2-3 working days.
- In stock with our supplier Not on our shelves, but our supplier has it or it is already on its way to us. We bring it in as soon as you order, and the despatch estimate shown allows for that.
- Out of stock Neither we nor our supplier has it right now. Where a date is shown, more is on order and you can order now to secure one from that delivery.
- Stock to be confirmed Not on our shelves, and our supplier does not send us stock figures for it, so we cannot say how soon we could get one. Use "Check availability" and we will ask them and email you back.
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Attributes
| Colour | Grey |
|---|
In-stock items ordered before 2pm are dispatched the same day. Free delivery over £50.
Thirty-day returns, free from any UK address.
About FSA
Full Speed Ahead has it one of central Taiwan’s largest and most efficient factories. Featuring hot press carbon rim moulding machines and 5-axis high-speed CNC machines, FSA products are extremely high quality and highly desired in the cycling World.
Shop all FSADetails
FSA Xtreme Pro Lower Headset. See specification below for each headset model.
Features
- High quality stainless steel bearings
- Higher quality seals
- Laser etched graphic to easily identify the headset spec plus provides a higher quality look
Sizing
ZS44/40: For 1.5"" tapered forks.
- Inner Diameter: 44.0mm
- Outer Diameter: 62.0mm
- Lower: 1.5"", 36x45° ACB (Grey seal)
- Weight: 78.7g
Specification
EC49/40: For 1.5"" tapered forks.
- Inner Diameter: 49.6mm
- Outer Diameter: 60.0mm
- Lower: Alloy Cups With 1.5"", 36x45° ACB (Grey seal)
- Weight: 78.3g
Specification
IS41/28.6: For 1-1/8"" tapered fork.
- Inner Diameter: 41.2mm
- Outer Diameter: 45.0mm
- Lower: 36x45° ACB (Grey seal)
- Weight: 24.2g
Specification
IS42/30: For .1/8"" tapered forks.
- Inner Diameter: 42.0mm
- Outer Diameter: 46.0mm
- Lower: 45x45° ACB (Grey seal)
- Weight: 34.7g
Specification
IS49: For 1.25"" tapered forks.
- Inner Diameter: 47.0mm
- Outer Diameter: 62.0mm
- Lower: 1.25"", 45x45° ACB (Grey seal)
- Weight: 34.8g
Specification
IS52/40: For 1.5"" tapered forks.
- Inner Diameter: 51.2mm
- Lower: 1.5"", 36x45° ACB (Black seal)
- Weight: 46.5g
Specification
ZS56/40: For 1.5"" tapered forks.
- Inner Diameter: 56.0mm
- Outer Diameter: 62.0mm
- Lower: Alloy Cup With 1.5"", 36x45° ACB (Grey seal)
- Weight: 60.5g
Specification
ZS44/28.6: For 44mm ID head tubes.
- Alloy top cover
- 1-1/8"" steerer
- Inner Diameter: 44.0mm
- Outer Diameter: 50.0mm
- Upper: 1.1/8"", 36x45° ACB (Grey seal)
- Discipline: Road, MTB
- Material Aluminum
- Weight: 34.2g
Features
Specification
