Hello,

First of all I'd like to apologize for several things: I really don't know a whole lot about bikes, and I'm not confident this is the right forum section to be posting this question in (if I'm wrong, please re-direct me, thank you).

I have a mountain bike and I'm trying to install a Schwinn seat post rack to it. I thought "loosen struts, slide post in, tighten bolts" would be easy enough to figure out, but once I picked up a rubber shim and realized I had NO clue how it's supposed to be used or where to put it, I gave up all hope.

This is a picture (from Google images) of the rack I have: http://ecx.images-amazon.com/images/...L._SL1200_.jpg I know where the post slides into, I don't know where the rubber shim goes or how to secure it. I also couldn't find any images of the rubber shim, either, for that I apologize.

No how-to videos I could find were helpful. Any help would be appreciated. Thank you!