I changed my crankset on my roadbike from a 48/38/28 to a 42/32/22 . I had to change the bottombracket for it to fit. Your front derailleur may or may not work.Mine worked fine. Kind of trial and error. If you have to pay someone labor it may run some cash. I bought a Nashbar Big Tool Kit and with a Bicycling Complete Guide to Bicycle Maintenance and Repair, had a great time swapping parts. I added a 13-32 cassette and mountainbike rear derailleur. Love it!