Bicycle Anatomy

1. Seat Stay
Seat stay- The part of the frame that connects the top of the seat tube to the rear dropout. It usually intersects the seat tube near where the top tube joins the seat tube.

2. Front Derailleur
Front Derailleur - The mechanism that moves the chain from one chainring to another (found above the bottom bracket).

3. Frame
Frame - A bicycle frame is the main component of a bicycle, onto which wheels and other components are fitted.- A bicycle frame is the main component of a bicycle, onto which wheels and other components are fitted.

4. Headset
Headset - the components (including the ball bearings) that allow the handlebar to rotate and steer the fork.

5. Head tube
Head tube - The head tube contains the headset, the interface with the fork. In an integrated threadless headset, the bearings interface directly with the metal surface on the inside of the head tube.

6. Fork
Front Suspension Fork - holds the front wheel and provides shock absorption so the rider can keep the front wheel on the ground and maintain steering control over the bike.

7. Dropouts
Dropouts - the slots on the frame and fork that holds the wheel axles.

8. Cassette
Cassette - toothed cogs that make up the gears (attached to the rear wheel).

9. Rear Derailleur
Rear Derailleur -The mechanism that moves the chain from one gear to another (found below the rear dropout). More about Derailleurs.

10. Chainstay
Chainstay - a section of the frame that connects bottom bracket to rear dropout.

11. Bottom Bracket
Bottom Bracket - the bottom bracket includes the pedal axle and bearings.

12. Chainrings
Chainrings - toothed rings that directly connect to the crank.

13. Crank
Crank - connects the pedals to the chainring.

14. Pedal
Pedal - Types of Pedals

15. Down tube
Down tube - frame tube that connects the bottom bracket to the Head Tube.