英语一周一贴：Mr Nice Man needs Bicycle parts discription

haichao

Hello, I need help to explain some parts of a bike. That means i have to discribe the function of the following parts, how they work an why they are indispensably.

seat or saddle
frame
brakes
tire
wheels
chain
rim
pedals
spokes
fork
brake lever
steering oder handlebar
frame
gearshift
dynamo
mud protector
Hope you can help me to write the discription. Not more then 2 sentence for each word.