Join Date: Apr 2010
Location: Vlaamse Ardennen, Belgium
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It depends on exactly what you have now and exactly what you aim to achieve.
Since you give no specifics whatsoever, I cannot help you.
For instance: if you have a 7 speed cassette now ... you're going to have a hard time finding an old 7 speed road-crank.
Unless you are not talking about chinging your drivetrain but simply want to change to a dropbar ... then you can just fit any dropbar and roadstem easily.