Hier noch mehr !
Thereâs also a new Si 3D Forged Hollow Cranks. Itâs a one piece crank, not a clamshell design like their SL models. Washburn says theyâve invested a lot in forging technology over the past couple years to develop their OPI (One Piece Integration) Lefty legs and stems. This tech is now used on these new cranksets, which will let them put their crank arms on more bikes while using chainrings from FSA and others. Weight is 609g for this crankset with FSA compact chainrings (excluding BB). Spider and arms are separate, so you only have to change the spider to go to a standard chainring combo.
Und noch mal zur SiSL2 !
NEW 484G HOLLOWGRAM SISL CRANKSET FROM CANNONDALE W/ ONE PIECE CHAINRINGS!
posted by Tyler (Editor) - June 19, 2012 - 12pm EDT
Cannondaleâs set the benchmark again for mass production lightweight cranksets.
Their new SiSL2 cranksets are
100% CNC machined in a clamshell design thatâs 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 thereâs 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 thatâs equal to Dura-Ace. Theyâre 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.
This crankset combo will come on the new Womenâs EVO, available in a new 165mm length on the 44cm frames, and on the top three menâs SuperSix EVO road bike models.
From:
http://www.bikerumor.com/2012/06/19...nkset-from-cannondale-w-one-piece-chainrings/
Happy trails !
Steve