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FSA No. 55R 1.5” ACR LS - Fully Integrated ACR Headset
FSA No. 55R 1.5” ACR LS — Fully Integrated ACR Headset (No Rotation Limit)
FSA No. 55R 1.5” ACR LS integrated headset with fully hidden cable routing, no rotation limit, and angular contact bearings—designed to work with the State Bicycle Carbon Road Frame (2026). Fits 55.8mm OD head tubes and 1-1/8” to 1.5” tapered forks.
current price, £38.00
7588346200151
If you’re building a clean, modern cockpit with fully hidden cables, the FSA No. 55R 1.5” ACR LS is the headset that keeps everything tight, smooth, and stealthy. Designed for ACR (Aerodynamic Cable Routing) setups, it routes your lines through the headset for a truly integrated front end—without the annoying rotation stop. That means full steering range, cleaner aesthetics, and a premium feel every time you drop into a corner.
Built with angular contact bearings for smooth, durable performance and precise tracking, the No. 55R is made for frames specifically designed for ACR-style internal routing.
Key Features
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Fully integrated cable routing (ACR) for a clean, modern front-end setup
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No rotation limit for unrestricted steering
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ACR top cover for a seamless integrated finish
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Angular contact bearing (ACB) for smooth, long-lasting performance
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Specific frame required (must be compatible with ACR/internal routing)
Specs
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Headtube size: 1.5”
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Bearing spec: 36° / 45° ACB
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Head tube OD: For 55.8mm OD head tube
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Fork compatibility: 1-1/8” to 1.5” tapered fork
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Stack height: 10.9mm (10.4 + 0.5)
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Weight: 92g
* Compatibility Note: Designed to work with the State Bicycle Carbon Road Frame (2026) ACR integrated routing platform.
RETURNS & EXCHANGES:
You have 30 days from receiving your order to request a return or exchange. Return shipping fees may apply. Some items are final sale / non-returnable.
Add the Package Protection Plan at checkout for free return labels, free exchanges, extended 60-day window, and coverage for loss/theft/damage in transit.
View full Return Policy .
SHIPPING:
Most in-stock items ship within 1 business day. You’ll receive tracking as soon as it goes out.
Learn more: Shipping Policy.
ASSEMBLY:
Complete bikes ship ~90% assembled, but final setup and tuning should be done by a professional mechanic. This keeps you safe and helps validate your warranty.
WARRANTY: Warranty activates when you submit proof of professional assembly.
- 5-year warranty on all bicycle frames
- 1-year warranty on non-consumable parts
- 2-year warranty on Essor USA products
Details: Warranty Policy.
SIZE CHARTS & SPECS:
Need fit or tech info? Find detailed geometry charts, size guides, and build specs here:
Size Charts & Specs.
SUPPORT:
Have a question or an issue with your order (damaged in shipping, missing items, etc.)?
Reach out and our team will take care of you:
Contact Us or email info@statebicycle.com.
