It offers the maximum feasible ratio of high rigidity and lowest weight. Both bolts, Cannondale Mark IV rings, spider and bolts, BB30 spindle and spacers. Those Spiderings are replacement rings for Cannondale's own cranksets. or Best Offer. Free shipping. Works with road and mountain configurations and takes all Hollowgram spiders and SpideRings. Crank arm length: 175mm 53/39T rings. The new Gen 3 single-sided Stages Power L meter for Cannondale Si Stages Power meter is built on to a non-drive-side Cannondale Si crank arm and is compatible with existing Cannondale Hollowgram Si crank models - 2014 or newer and Hollowgram SiSL2 cranks. Everything you need but a bottom bracket. I am not sure, but think the SL arms are lighter still and between the other 2 in stiffness. The FSA k-lite rings fit and work perfectly, and look better. Only 1 left! Current weights are: Si: not able to find good info, but they are standard forged like old Shimano and lower end forged crank arms, so expect heavy Hollowgram Si: 165 per arm Hollowgram SiSL2: 125 per arm In the past there was an SISL (not 2) that split the difference at 140ish. They will not fit normal cranksets. The SI were introduced for the 2013 model years and have 3D-forged one-piece arms so they're cheaper to manufacture but a little heavier. If you must have those rings and don't want high end SiSL kit, your best bet is to buy the cheaper Cannondale Si crankset complete with Spiderings from Triton Cycles at £314.99. Each half of the crank arm is machined as a single piece, then they’re bonded together to create a hollow, extremely light crank arm. Their new SiSL2 cranksets are 100% CNC machined in a clamshell design that’s bonded together. There's been a few generations of Cdale crank arms. cannondale hollowgram si crankset. CANNONDALE crank arm Hollowgram SiSL2 | Left The Hollowgram SiSL2 crank arm is an extremely light, two-piece construction that is elaborately milled from 2000 aluminum CNC and then glued into a simple work of art. $10.53 shipping. Cannondale’s set the benchmark again for mass production lightweight cranksets. or Best Offer. Cannondale Si left crank arm, compatible and interchangeable with Cannondale SiSL2 and Hollowgram Si crank arms. 0 bids. Cannondale Hollowgram 2021 Model Crank Arm Left 175mm CP2001U1075. $250.00. Ask questions for compatibility and fit. The regular SI arms are 11% stiffer than DuraAce 7800 and lighter too. Free shipping. $249.99. SISL2 Road Crankset The SISL2 Crankset assembly process is different from the Hollowgram SL crankset as it is installed in a manner similar to a 2 piece crankset. $100.00. The Praxis rings just wouldn't work - they were just 0.5mm or so too far apart when fitted to the spider, so the chain kept dropping between the rings. Cannondale Hollowgram SI Crankset Includes both crank arms. The Carbon arms are as stiff as DA 7800 and weigh almost as much. The SL arms are like the SI non-carbon arms I am fairly sure. Highs: Weight, performance and value Lows: BB30 only Cannondale’s range-topping SiSL2 has a sub-500g weight, but its prohibitive price limits its appeal. Cannondale Hollowgram Si BB30 Crank Arm 172mm Right - KP305/172R. No, it's Ultegra 6800; BB30A, cannondale Cranks & spider - the cranks say "SI" but the crank bolts say "SISL2", FSA rings. The SISL2 system is much better at setting correct chain line because there is only one 2.5mm drive side spacer and all tolerances are taken up on the non-drive side of the crank. Si left crank Arm, compatible and interchangeable with cannondale SiSL2 and Hollowgram Si arms! The regular Si arms are as stiff as DA 7800 and weigh almost as much work,! 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