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Cannondale Hollowgram Si SL2 Crankset
Defining the global standard in ultra-light, super stiff cranksets. Revolutionary hollow CNC crankarms with best-in-class weight and stiffness, available in 165, 170, 172.5 and 175mm lengths. OPI (One-Piece Integration) SpiderRing, an ultra-stiff single-piece combination of the chainring and spider machined out of one solid block of aluminum alloy, is available in standard or compact options, 10- and 11-speed compatible. Complete crankset includes spindle and all bottom bracket parts for PF30, BB30, and original in-frame BB30 system. See Kit List for complete Hollowgram and BB30 service parts.