Trek
FSA 1-1/8˝ Upper Headset Bearing
The FSA 1‑1/8˝ Upper Headset Bearing is a smooth, durable replacement part designed to keep your steering precise and your bike feeling fresh. It’s a reliable upgrade for many Trek MTB integrated headset systems.
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Compatible with most Trek MTB integrated headset systems
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Sealed bearing for long life
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Works with Knock Block headsets
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Bearing size: 41 mm × 30.2 mm × 6.5 mm
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Steel construction for durability
Ideal for: Riders replacing worn headset bearings to restore smooth steering and dependable handling.
Shipping information
Ships in 2–3 business days with free delivery across Canada on orders over $99. Same‑day pickup available Tue–Sat (closed Sun–Mon).
Returns & warranty
Enjoy hassle‑free returns within 30 days on unused items in original packaging (excludes bikes and sale items). Free in‑store returns anytime.