- The AER-Series maintains the quality and durability our bearings are known for, while shaving 35% of the weight
- Hybrid steel and aluminum bearing that provides even greater durability and a 40% weight savings over comparable models
- Strategic machining and precision contours provide an optimal balance between weight savings and strength
- An ideal headset choice for road and mountain bike applications
- Aluminum crown race with integrated low-friction seal
- 45x45 degree contact angle bearing
- Crown Race: 1.5"
- S.H.I.S.: EC44/40
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