eastside tele wrote an answer about Black Diamond Adjustable Tip Loops on July 9, 2010
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have some 110 BD ascensions from a few years ago before BD realized that tip loops needed to get bigger as skins got bigger. the tip loop was way too small and was always getting knocked off my ski (tip is 130). PITA. this has fixed my problems. easily fits over the 130 tip. and there is a lot more adjustment so could have gone over a much bigger tip even.
installation is easy. only tip is to make sure the screw is all the way in so that the skinnier "breakable" section clears the housing. that will make it much easier to break it off. once you look at the screw, this tip will make more sense.