Just saw this come up today, very exciting for everyone looking to run xx1, should be around 90 grams lighter than the xx1 bb30 crankset, in addition to adding the capability of running stages power meter on the left crank arm with an XX1 ring.

http://www.bikerumor.com/2013/03/01/can ... kes-w-xx1/

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There's already been two options here in terms of XX1 spiders for Hollowgrams: Experimental Prototype and Leonardi Racing. Both will work with the SISL2 cranks, though there hasn't been an SL2 axle for MTB yet. Anyway, here's a picture of an XX1 / SISL2 install on a BSA BB from NAHBS (my new bike)

http://www.velovert.com/photo_reportage ... adre_photo

The weight without BB (but including everything else) was 110g lighter than the XX1 GXP crank that it replaced.

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Enjoying my Funk