like fietsbob said as long as the frame is strong the sky is the limit on upgrades i converted my mtn bike to a tourer this winter and with my next pay check im up grading my bars to either aero bars or trek bars then im working on getting a rack for the front for front panniers my bike is the white next the blue one was my old tour bike it has over 5000 miles on it and on that white bike i already replaced the seat