Quote Originally Posted by Flur View Post
I've only got 7 cogs in the back.... if I can't use 2 of them, that seems like an issue that the LBS should have told me about.
Unless you've got a corncob in back, those aren't "usable" gears anyhow (i.e. they almost certainly overlap with gears you can get on the other chainring). You're really not supposed to be able to use every gear combination, because of cross-chaining.