No.55R/ACR/STD Integrated 1.1/8 - 1.5" 52.1mm Headset

* For 55.8mm OD head tube
* For 1.1/8" to 1.5" tapered fork
* ACR top cover (Aerodynamic Cable Routing)
* Angular Contact Bearing

**Spares**

* Top & Bottom Bearings: 073E (160-6761)
* Crown Race: H6126