IS-2 1-1/8''
by FSA
FSA IS-2 – 1-1/8'' Integrated Headset
Description
The FSA IS-2 is a lightweight, high-quality integrated headset designed for frames that use 41 mm internal diameter bearing seats.
It features precision 36°/45° ACB sealed bearings with blue seals, offering smooth steering performance and long-term durability.
With no external cups, the IS-2 keeps the bike’s front end clean, low-profile, and lightweight—ideal for road, gravel, and performance hybrids.
Specs
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Headtube OD/ID: 45 mm / 41.2 mm
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Upper bearing: 1-1/8'' – 36°/45° ACB (blue seal)
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Lower bearing: 1-1/8'' – 36°/45° ACB (blue seal)
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Stack height: 16.8 mm
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Headset weight: 65 g
Attributes
Bearing Grade: ACB Sealed
Crown Race Diameter: 30 mm
Lower Cup: 41 mm
Headset Type: Integrated
Upper Cup: 41 mm
Headset Weight: 65 g
Misc: 36°/45° ACB (blue seal)
Material: Aluminum
Primary Color: Silver
S.H.I.S.: IS41/28.6 | IS41/30
Steerer Tube: 1-1/8''
Stack Height: 16.8 mm
Headset Position: Complete
SHIS Upper: IS41/28.6
SHIS Lower: IS41/30