Originally Posted by redtires

rodrigaj...fear not!! Here are a couple of pieces of info for ya... One, you can generally get cable "lining" at a good LBS for pennies. Two, if you don't use it, good luck wearing through your nice, thick bb shell any time soon from from the volitile act of, uh...shifting...lol! And finally, as far as friction goes...hopefully, your finger strength will always be stronger than the combined resistance of the derailleur spring and extremely low cable friction found at the bb shell. As for the return (upshifting), the cable always loses tension, thus it is all up to the spring to do the work. The slack cable will have virtually no friction itself.