I highly reccommend Campus Wheelworks on Elmwood Ave. Very knowledgeable, friendly and helpful staff. When I was building my bike up, I was in there every other week, and they were happy to give plenty of free advice. Naturally, I reciprocated by buying a bunch of stuff there, and reccommending them to people....just....like...this.

Bert's is allright, but they also sell a lot more than bikes (atv's, motorcycles, etc.), so you may not get the same kind of service.