SRAM XX Crank + Custom Chainring = ? Bolts
I am trying to cut the weight of my friend's XX crank by replacing the very heavy rings with some custom ones. This should cut almost 100g off.
BUT - the XX big ring is threaded so wondering if we can use standard hollow chainring nut/bolts.
BUT you can't.
The XX arm holes are about 1mm wider in diameter and the head of the bolt needs to be about 2.5 mm wider.
I guess the custom chain ring could have a standard hole and a washer could be used but where to source one at the exact size?
Also, there would still be some wiggle in the XX arm hole interface with the slightly thinner chainring nut/bolt.
Does anyone know the size washer is needed?
will put calipers on it later but maybe someone already has done this?
Or should we just sell this crankset and get a Lightning 2x10 unit?
Thanks for any help-
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