Integrated headset with ACR technology for clean cable integration.
The FSA NO.55R ACR headset is the ideal solution for modern road and gravel bikes with fully integrated cable routing. Thanks to ACR technology, cables run completely through the stem and frame - for a clean look and improved aerodynamics.
The headset is designed for tapered steerer tubes (1 1/8" – 1.5") and fits frames with a corresponding 1.5" head tube.
Highlights:
- ACR cable integration: fully internal cable routing for a clean look.
- For modern cockpits: compatible with ACR & ICR stems.
- Tapered compatible: 1 1/8" – 1.5" steerer tube.
- High-quality bearings: durable angular contact bearings.
- Lightweight design: only approx. 92 g for high-end builds.
Technical specifications:
- Manufacturer: FSA
- Model: NO.55R ACR
- Type: headset
- Standard: IS52 / ZS56
- Steerer tube: Tapered 1 1/8" – 1.5"
- Head tube: 1.5"
- Bearings: 36° x 45° ACB
- Stack height: approx. 10.9 mm
- Material: Aluminium / stainless steel
- Weight: approx. 92 g
Important note:
- Only compatible with frames and stems featuring an ACR or ICR system
Scope of delivery:
- 1x FSA NO.55R ACR headset
- Delivery in workshop packaging - securely packaged, without original packaging
“Clean cockpit and modern integration - the perfect headset for high-end builds.”
SKU: N0B3
FSA NO.55R ACR headset IS52/ZS56 | 1.5" tapered integrated
Integrated headset with ACR technology for clean cable integration.
The FSA NO.55R ACR headset is the ideal solution for modern road and gravel bikes with fully integrated cable routing. Thanks to ACR technology, cables run completely through the stem and frame - for a clean look and improved aerodynamics.
The headset is designed for tapered steerer tubes (1 1/8" – 1.5") and fits frames with a corresponding 1.5" head tube.
Highlights:
- ACR cable integration: fully internal cable routing for a clean look.
- For modern cockpits: compatible with ACR & ICR stems.
- Tapered compatible: 1 1/8" – 1.5" steerer tube.
- High-quality bearings: durable angular contact bearings.
- Lightweight design: only approx. 92 g for high-end builds.
Technical specifications:
- Manufacturer: FSA
- Model: NO.55R ACR
- Type: headset
- Standard: IS52 / ZS56
- Steerer tube: Tapered 1 1/8" – 1.5"
- Head tube: 1.5"
- Bearings: 36° x 45° ACB
- Stack height: approx. 10.9 mm
- Material: Aluminium / stainless steel
- Weight: approx. 92 g
Important note:
- Only compatible with frames and stems featuring an ACR or ICR system
Scope of delivery:
- 1x FSA NO.55R ACR headset
- Delivery in workshop packaging - securely packaged, without original packaging
“Clean cockpit and modern integration - the perfect headset for high-end builds.”
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F.S.A. S.R.L. / Full Speed Ahead develops precision bicycle components, including cranksets, cockpits, headsets, wheels, and drivetrain parts built for efficient performance. The brand stands out for combining Italian cycling heritage with modern engineering for road, gravel, mountain, and e-bike riders.
Via Francesco Petrarca. 4
20123 Milan
Italy Email: info@fullspeedahead.com Phone: +39 039 688 52 65 Website: http://www.fullspeedahead.com/