I recently bought an 2000 or '01 trek 7000. Solid bike but it has some problems. I am not sure what it is, but there is a creaking coming from what I think is my BB. Also the breaks are very worn and not as good as I would like. It has right now Avid 10s. I am looking for some cheep disk options that will be reliable. I am a college student so I do not have much money... and I already know I need a new hub. So i am wondering about these mechanical disc sets. Are those any good? I really would not like to go above $80. BTW I have a manitou fork. Thanks for your time.