I'm somewhat new to this so forgive me if I use the incorrect lingo.
I have a Specialized Allez with two "chain rings" up front and a rear cassette with 7 or so gears. I've noticed some slipping between the 3rd and 5th gears. I'll get a clicking sound and, at times, the gear will shift on its own.
I'm assuming this is a rear derailleur issue. Is this something that can be fixed via an adjustment or is this something that would require a replacement of the derailler?
Thanks in advance.