Originally Posted by DaFriMon

For the gear adjustment, if you have it working, then there's nothing to worry about for now. Which part were you having trouble with, though? The indicator rod that it talks about is just a metal rod attached to the end of the little chain that runs into the axle. If you put the bike in 1st gear, you should be able to see the end of the rod clearly where it's attached to the chain. When it's in 2nd gear, the end of this rod, where it attaches to the chain, should be just level with the end of the axle. In 3rd gear, the rod will be entirely inside the axle, and you won't be able to see it.

By the way, did your bike not come with the rack, or did you remove it?