>>2008924>possible?Absolutely. You mentioned you don't like not being able to brake while riding on the bar. There are in-line brake levers which give you an additional position.
>worth it?Depends on how happy you are with the rest of the bike. As you said you'll need new shifters, brake levers, grips and bar but since you can sell off your old bar and brifters you won't be spending that much.
