Notes
- BAA2297 is a drop-in bearing upgrade kit for FSA IS42/IS52 headsets (commonly found on current Specialized mountain bikes). Designed to work with existing headset bearing cover and compression ring. Sealed crown race included.
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BAA2191 – 49.5/40.5|52/40 – fits the 2024 Specialized World Cup.
*Our ZN40 bearings (used in all 40 Series headsets) can feel rough in hand initially. This is a necessary side effect of the corrosion-resistant zinc coating used on the balls and races. This initial roughness wears in, becoming smoother with use, and extends the overall lifespan of the bearings.
Bearing Compatibility
- EC30 will take a 38mm bearing
- EC34 will take a 41mm bearing
- ZS44 will take a 41mm bearing
- ZS49 will take a 41mm bearing
- EC44/40 will take a 52mm bearing
- EC44/33 will take a 47mm bearing
- EC49 will take a 52mm bearing
- ZS56 will take a 52mm bearing
- ZS62 will take a 52mm bearing
- IS41 will take a 41mm bearing
- IS42 will take a 42mm bearing
- IS47 will take a 47mm bearing
- IS52 will take a 52mm bearing
