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But the weight difference is tiny, with the red crank being 60g or so heavier
How much actually are the lightest SISL2s? My red cranks are 525g with chainrings and axle. Without chainrings that makes them around 400g for arms and spider. Sure, the spider isnt detachable but who really swaps cranks between bikes that often? Or has the weird cannondale tool for that matter. That said, I'd love some spiderings on my CAAD6
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Or has the weird cannondale tool for that matter.
You're talking to @Howard , he has all the weird cannondale tools
Turkish
branwen
edscoble

I'm not sure there's been a Red crank that's lighter or stiffer than Hollowgram SL or SiSL2.
But the weight difference is tiny, with the red crank being 60g or so heavier. So might as well call it even.
Hollowgrams just look better, have detachable spider, cross compatible with MTB shiz and IIRC stiffer...might be wrong on that though.
And you can trace their lineage back to this
Which is kinda cool