Ever seen those Shimano ads that feature a rock or tree root balled up into a fist, ready to deliver a death blow to your rear derailleur? In real life, sticks and rocks will be better hidden but just as deadly. If you have an Ibis mountain bike, perhaps you should add this to your tool kit. The Ibis Derailleur Hanger is designed to give way in the event you tangle with a rock or stick, sparing your expensive new derailleur and frame. 16 grams

Note: Mounting hardware is not included.