Cannondale HollowGram Spider Lockring KP021/The Cannondale Hollowgram Spider Lockring KP021 fastens the spider to the Hollowgram crankarm. Compatible with all Cannondale BB30 Hollowgram cranks. This lockring was redesigned to fit the Evo’s press-fit bottom bracket. If you have an Evo you can only use this lockring, the older model will not fit. Includes one allow lockring and does not include locktite KT012 tool for installation and removal.680655399010