I ' ll chime in on components If the upgrade is to something specific that you want IE discs vs nondiscs , then they are a good idea . I really like disc brakes because I ride all weather in traffic and i like brakes that work when i need them to . If it ' s to get a better groupo , it ' s a waste of money . The difference between moderately well maintained components once you get above the BSO level is literally tiny . They weigh less , they shifter snappier , they don ' t change the fundamental physics of the universe or anything and for the money , they ' re generally not worth it . This is a law of rapidly diminishing returns . If you ' re racing , its worth it . If you ' re not , it ' s not . They are also generally more expensive to replace when they do wear out , so you ' re looking at a higher cost of running your bike in the long term . I ' m sure other folks have different opinions on that .