FSA headset NO.55R 1 1/8" to 1.5" / ACR / 3 mm with expander | matt black
The FSA headset NO.55R 1 1/8" to 1.5" / ACR / 3 mm with expander is suitable for gravel and road bikes with carbon steerer tube and internal cable routing. The lower fork cone, like the upper clamping cone, is made of high-quality aluminum. It is a special headset for frames with a continuous 1.5" head tube and is suitable for tapered steerer tubes with 1.5" diameter at the bottom / 1 1/8" diameter at the top.
ACR - Aerodynamic Cable Routing
This is an internal cable routing system in which all cables are routed invisibly through the stem, handlebars and head tube.
Expander
To protect the carbon steerer tube, the expander is screwed into the steerer tube and distributes the clamping forces gently.
Technical specifications:
Material: steel, aluminum
Construction: CR System, ACR
Steerer tube: 1 1/8" to 1.5" tapered
Press-fit dimension top Ø: 52 mm
Press-in dimension bottom Ø: 52 mm
Outer diameter top: 55.8 mm
Outer diameter bottom: 55.8 mm
Overall height top: 10.4 mm
Overall height bottom: 0.5 mm
Bearing: angular contact ball bearing
Color: silver, matt black
Weight according to manufacturer: n/a
Weight weighed: 121g
Scope of delivery: 1x FSA headset NO.55R 1 1/8" to 1.5" / ACR / 3 mm with expander | matt black