Full Speed Ahead Orbit-Z Internal Upper Headset - H2051A 1-1/8" ZS44/28.6 36x45 5.3/13.1mm BLK MFPN=20503 Chainline/Hub Compatibility 135/142 MTB Hubs

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

Suits all kinds of activities

Waterproof (IPX7 waterproof to 1 meter for 30 minutes

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

Safe Lock feature prevents unintentional opening of the binding during race action

Full Speed Ahead Orbit-Z Internal Upper Headset - H2051A 1-1/8" ZS44/28.6 36x45 5.3/13.1mm BLK MFPN=20503 Chainline/Hub Compatibility 135/142 MTB HubsFull 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