New 484g Hollowgram SiSL Crankset from Cannondale w/ One Piece Chainrings!
Cannondale’s set the benchmark again for mass production lightweight cranksets.
Their new SiSL2 cranksets are 100% CNC machined in a clamshell design that’s bonded together. The spindle has been machined down more, too, which also made it stiffer. This model has additional machining to save weight, and the remaining material was move around inside the arms to improve the strength. So, these are both lighter and stiffer.
Spidering is 3D forged then machined into a one piece. Forging pushes all the grains outward from the center for improved stiffness. By eliminating the bolts, Murray Washburn, global director or product marketing, says there’s no deflection during shifting. Even with the minimal spider arms, the ramp profiling and pins are similar to regular rings.
Combined, they claim it provides better power transfer with shifting that’s equal to Dura-Ace. They’re available in standard 53/39 and a 50/34 compact with either 10 or 11 speed tooth profiles and chainline.
Claimed weight for the Spidering, SiSL2 cranks arms, bolts and spindle is 484g for the compact 172.5.