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FSA

FSA Orbit IS 138 head assembly

36.99 
RRP 50.99 
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From 25.02.2026 (Wednesday) Check availability
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Delivery method on Thursday 26.02.2026
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Delivery method on Thursday 26.02.2026
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Integrated head assembly designed for frames with a head tube
• top: with inner diameter 41.2mm/outer diameter 45mm
• bottom: with inner diameter 49.1mm/outer diameter 52mm
and a tapered fork post 1-1/8"-1-3/8".

FSA TH-873E, 36°x45° and FSA IS-2-138, 36°x45° Angular Contact Ball bearings (ACB - Angular Contact Ball bearings) have a high running accuracy, which is ensured thanks to an optimized internal structure that allows capture at the same time acting radial and axial loads.

Height of the upper cover 15mm.
Height of the head assembly outside the frame (stack height): 15mm
The package contains the FSA hedgehog for the metal fork post.
Weight 66g.

Product details
Fork neck conical (tapered) 1 1/8" - 1.5"
product ID 110385
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FSA (Full Speed Ahead) is a global brand with a very wide range of products for all cycling disciplines. In its assortment, it even has its own road set, under the subsidiary brand Vision it mainly offers road wheels, including specialities for time trial and triathlon.

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