The frame is one of two pieces actually manufactured by Cervélo. It is all high grade aluminum and although carbon fiber would be lighter, it feels deceptively light as well. The "frame" is actually purchased as the "frame set." It's all the pieces which actually come from the Cervélo factory when you order the frame. These parts include the frame as seen above and the following parts:
The fork...
The fork is the all carbon fiber Funda Pro and is made by 3T for Cervélo specifically in this case. 3T has been providing forks for the Cervélo S series bikes for a couple of years now.
The headset...
The headset is the set of bearings and compression pieces which allow the fork to rotate smoothly within the frame. The stock headset is made by FSA or Full Speed Ahead. FSA is a major provider of low to pro level components and in this case provides Cervélo with their IS-2 headset for the S1. The IS-2 is called an integrated headset since the bearings rest in cups which are integral to the frame. These bearings are sealed steel ball bearings.
And...the seatpost...
The seat post is the carbon fiber Aero SL and is the second of two pieces made by Cervélo. One of the cool things about this bike and about Cervélo is that they make what they call an aero rode bike. This seat post is a perfect example of the aero-ness. You can see the profile shape of the seat post which has an air-foil shape to help cut through the air. This shape is incorporated to the other parts of the bike as well. This is typically found just in time trial bikes, but Cervélo has designed their road bikes to incorporate these profiles without sacrificing stiffness throughout the frame.
The fork...
The fork is the all carbon fiber Funda Pro and is made by 3T for Cervélo specifically in this case. 3T has been providing forks for the Cervélo S series bikes for a couple of years now.The headset...
The headset is the set of bearings and compression pieces which allow the fork to rotate smoothly within the frame. The stock headset is made by FSA or Full Speed Ahead. FSA is a major provider of low to pro level components and in this case provides Cervélo with their IS-2 headset for the S1. The IS-2 is called an integrated headset since the bearings rest in cups which are integral to the frame. These bearings are sealed steel ball bearings.And...the seatpost...
The seat post is the carbon fiber Aero SL and is the second of two pieces made by Cervélo. One of the cool things about this bike and about Cervélo is that they make what they call an aero rode bike. This seat post is a perfect example of the aero-ness. You can see the profile shape of the seat post which has an air-foil shape to help cut through the air. This shape is incorporated to the other parts of the bike as well. This is typically found just in time trial bikes, but Cervélo has designed their road bikes to incorporate these profiles without sacrificing stiffness throughout the frame.
