Originally Posted by Leisesturm

I looked back to the o.p. and I find no details of what bike they are looking to convert. It matters. I think it's safe to say that the majority of conversions are from flat to drop. And most, maybe all, were done before 'modern' drivetrains and their highly specialized nature. So without details on the actual bike it is hard to say if this is something worth doing. Especially since the desired outcome is information. I personally doubt that a 40 year old injury has any bearing on present issues. Just about as many people find drops help their pain issues as find it makes them worse. There has got to be a less costly way to learn if a flat-bar form factor is twtg. And I do mean costly. They are looking at potentially having to replace all their drivetrain and control surfaces. And they want 'light', 'high performance' kit to boot. There is a reason that ALL road bikes are a drop bar configuration. A hybrid is another thing entirely. A used mid-high end hybrid might be purchased for what would need to be invested in time, sweat and cash in a conversion.