The Acros Headset Upper – ZS49/28.6 delivers the kind of smooth, precise steering performance every rider expects from a premium headset upgrade. Designed as a direct replacement upper assembly, it’s built to handle everything from fast-paced singletrack to long road miles with confidence-inspiring stability.
Inside, high-quality angular contact ball bearings provide excellent load distribution and reduced friction for long-lasting durability, even under heavy steering forces. Whether refreshing a tired cockpit or fine-tuning a new build, this headset upper keeps your front end tight, responsive, and ready to roll.
Key Features:
Fits ZS49/28.6 head tubes for a clean, integrated look
Angular contact bearings deliver smoother steering and better longevity
Durable construction stands up to demanding riding conditions
Ideal for performance-focused riders rebuilding or upgrading their headset
Specifications & Identifiers
Bearing Type
Angular Contact
Color
Black
Defined Color
Black
Headset Steerer Fit
1-1/8" Threadless
Material
Aluminum
S.H.I.S. Stem Clamp
28.6 Threadless
S.H.I.S. Upper
ZS49
Stack Height
8.5mm
MPN
25.02.605R3S
Tree Fort ID:
333222474329
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