Full Speed Ahead Orbit-Z Internal Upper Headset - H2051A 1-1/8" ZS44/28.6 36x45 5.3/13.1mm BLK MFPN=20503 but still is racy

but still is racy

Chainline/Hub Compatibility 135/142 MTB Hubs Chainline/Hub Compatibility 141/148 Boost Hubs Color Black/Silver Defined Color Black Defined Color Silver Direct Mount Type Direct Mount SRAM Drivetrain Speeds 12 Material Aluminum Offset 0 Ring Position/Type Chain Retaining Single Ring Round or Oval Round Tooth Count 38

}Zipp 188 (V6) Rear Hub Axle 10-speed 130 OLD Hubs 13mm Internal Diameter Silver

Suits all kinds of activities

The LoneWolf Aero Blade Chainguide for Cervelo was designed specifically to mount directly on the front derailleur mount of the Cervelo S5 and P5 bikes

Full Speed Ahead Orbit-Z Internal Upper Headset - H2051A 1-1/8" ZS44/28.6 36x45 5.3/13.1mm BLK MFPN=20503 but still is racyFull Speed Ahead Orbit Z Internal Upper Headset H2051A 1 1 8" ZS44 28. 6 (36x45) 5. 3 13. 1mm Black. Replacement headset uppers from FSA. TECH SPECS Defined Color Black