CHL Cannondale’s own Hollowgram hubs ensure smooth rolling and fast engagement. Cannondale Road Hollowgram SiSL2, Hollowgram Si, and Cannondale Si crank spindle spacer set. Cannondale Hollowgram SI SL BB30 MTB Crank Arms 104 BCD 170mm Crankset PF30 You probably know that these are some of the nicest cranks in existence. We haven't seen any failures yet and you can find them reasonably priced from your retailer or on Ebay as well. HollowGram. I have the hollowgram SI mountain arms and spindle coming from a Scalpel 2017. Cannondale's Hollowgram Si wheelset does affect rotational mass, and the 25mm external, 19mm internal and 35mm tall carbon rims come with Stan's No Tubes rim tape. Here are some more details: In 2008. Kit includesNon drive 7.5mmNon drive 5.5mmNon drive 2.5mmDrive side 5.6mmDrive side 2.6mmTwo bearing shieldsSee diagram for proper spacer sizes for your bike. Simply the lightest, stiffest, bad-ass-est cranks ever to be bolted onto a mountain bike, the HollowGram SiSL2 represents the latest evolution of the crank that started the BB30 revolution. These are still used on many Cannondale bikes because they offer unprecedented performance compared to the competition. The Cannondale SuperSix Evo Ultegra was selected for an Editor’s Choice award in 2020. The SL has slightly revised arms with more material machined off from the inside, the arms are shorter after the pedal threads and there is a shaving around the arm mounting bolts. SiSL2 and Si Cranksets. The bike has a 68mm, PF30 bottom bracket shell, as a gravel bike, this has a Road shell. My only gripe is the complete SI crankset only comes in semi compact or compact. Expect to pay a premium for the Hollowgram SL or Hollowgram SI, especially in size 170mm. But it’s the lack of weight that takes your breathe away. You're better off buying a SRAM offering. 13 years ago, the original Cannondale HollowGram crank started the BB30 revolution and set a new standard for ultra-light, super-stiff cranks. HollowGram Si Cranks; HollowGram System Integration cranks are stiff, light, and modular, featuring one-piece direct mount chainrings. Cannondale's engineers revised the Hollowgram crank design, enlarging the core pocket, trimming weight and retaining the cranks' trademark stiffness. HollowGram SiSL2 with OPI SpiderRing: The evolution of the revolution. I have never ridden either so am after a standard. At 35mm deep, the rims of the Hollowgram Si Wheelset sit beautifully between aerodynamic and responsive, providing the handling of shallow depth rims but still offering improved aerodynamic efficiency out on the road. Supposedly, Cannondale did not have any problems with the three piece Carbon SI crankset. There was the old Hollowgram, back then they didn't call the BB interface BB30 but SI, then for the 2008 model year, they replaced the Hollowgram by the Hollowgram SL. When you lift the Hollowgram SiSL2 chainset out of the box, nothing quite prepares you for how little it weighs. The oversized crankarms convey a sense of purpose and the 10 arm chainring design, apparently inspired by race car wheels, lends the crankset a delicate presence. The most current evolution of the HollowGram, the SiSL2 continues this tradition of radical innovation. SAVE Micro-Suspension I have the bike built with mountain crankset and derrailleurs (sram x5). I definitely prefer the aesthetic of the Hollowgram spiderings over any other crank design and just realised that my frame came with the BB so buying a BB30 specific system makes installation much easier. Side 5.6mmDrive side 2.6mmTwo bearing shieldsSee diagram for proper spacer sizes for your bike any failures yet and you find. 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