The Acros Bearing Shell Top Fiber Insert is an original upper headset bearing shell designed for Acros head tube systems 103 / 113 / 133 HT, covering model years 2020–2025. It ensures precise bearing fit and smooth steering performance.
The fiber-reinforced construction helps reduce weight and dampen vibrations while maintaining the required stiffness and durability, making it ideal for modern carbon and high-end alloy frames.
As an original Acros spare part, it guarantees full compatibility and long-term reliability when used for servicing or replacement.
- Type: upper bearing shell
- System: Acros 103 / 113 / 133 HT
- Material: fiber-reinforced composite
- Part number: 18-05600
- Model years: 2020–2025