Life Savers are poured from the same material as the Kush line of footpads, so they can take a hit and bounce back. They take a beating so your hub doesn't have to. $39 for protection, or $500 for replacement, the choice is yours. TFL Life Savers give your rim (and your wallet) a fighting chance.
Installation instructions here: https://youtu.be/xgaNCzN1tI0
*NOT COMPATIBLE WITH MAGHANDLE
-o- If you're having trouble installing Float Life Savers, heat them up a bit with a heat gun/blow dryer/oven and that will make them a touch stretchier -o-