Hello everyone, new guy here. I am not a roadie, but an avid mtb'r. My wife is a fairly competitive triathlete and rides a several year old Trek 1000. The bike serves it purpose but is obviously not great. She was a swimmer from little tike to college graduation so that is where is does well in the tri's. Back to my question. She has some complaints about the bike and I am considering replacing some things such as the read der., casette, chain, and cables. It is all Sora right now. Can anyone suggest some upgrade parts that will be functional but not break the bank? I would much rather buy her a new ride but that's not in the budget just yet. Any help would be appreciated. Thank you very much.