ACROS Complete Headset for Colnago | ZS44 | ZS49

ACROS ZS headset compatible with Colnago frames featuring special press-fit diameters. The upper bearing cup is made of glass-fiber-reinforced plastic, and the lower bearing cup is made of aluminum. 

For more information on compatibility, check out the headset finder on the ACROS website. 

Technical Specifications:

- Upper press-fit diameter (ID): 44.65 mm

- Lower press-fit diameter (ID): 49.65 mm

- Upper angular contact ball bearing: 30 × 41 × 7 mm - 36°/45

- Lower angular contact ball bearing: 35 × 47 × 7 mm - 36°/45

- Stainless steel ball bearings