Full Speed Ahead ACR No. 55R Headset - 1.5" MFPN=CSM66.8AU0.NS1.BX There is a small internal

There is a small internal chain tensioner to hold the wheel in pos

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Full Speed Ahead ACR No. 55R Headset - 1.5" MFPN=CSM66.8AU0.NS1.BX There is a small internalFSA ACR (Aerodynamic Cable Routing) Headsets are suitable for both road and MTB riding styles and feature angular contact bearings. A fully integrated cable routing No rotation limit ACR top cover Angular contact bearing 1. 5" headtube Specific frame required Color Black Bearing Type Cartridge Angular Contact Crown Race 40 Weight 92 Defined Color Black Upper Stack Height 10. 9 S. H. I. S Upper ZS55 S. H. I. S. Stem Clamp Diameter 31. 8 Threadless S.