What feels good: upgrading to some awesome Magura disc brakes.
What feels terrible: trying to put them on your bike and having the wrong adapter and then having to research the right one, order it, take it on the chin for the quick shipping you know you're going to spring for, and crying yourself to sleep every night while you wait for the package.
This adapter is for Magura 74mm disc brake calipers with 180mm rotors, and fits the international standard 51mm frame/fork mount.
Item No. » MG-QM20
SAVE 10% = $1.00