ok so let me start by saying thanks for having me and thanks in advance for your help. My bike is a 2007 Jamis crosscountry and I am having problems with the front deraileur the chain rubs and sometimes the bike wont shift. I took it to my local bike shop and had a tune up. The mechanic at the shop said that the front deraileur wasnt factory to the bike and thats why I was having so much trouble with it but he was able to get it pretty close to right and rideable. He was wrong the bike is just as bad as ever maybe worse the chain rubs in almost every gear and like I said occasionally simply refuses to jump to the largest ring upfront. The front deraileur is a shimano deore so I am sure that it is not factory but isnt that the point of getting high end components for your bike to improve it not to have nothing but problems. Is it all in the adjustments that he didnt get right or should i just get a different derailleur. thanks for any advice