Re:Shocked by online comments, reporter writes profile of hi...
by weaksauce on Saturday October 02, 2010 @11:09AM
(#1750573)
Not the op but a rack is used to carry a few items on the back of your bike, the dynamo is used to generate electricity for a light and the chain guard stops your pants from entering the chain-to-sprocket pants ruining area.
On a separate and far less important note: As a relatively newbie bike commuter it would interesting to learn more about your set up and why you chose the accessories you mentioned in your post.