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Jan. 22, 2014, 12:03 p.m. -  Joe Dick

#!markdown Interesting. what chain ring bolts I was using on my single ring set up before did not fit in the 30 tooth. but the bolts I found which I am pretty sure came out of a granny ring worked. when I asked NSB about this I was told the bolt size for the 30 tooth is M8 x 0.75 Standard granny bolts length. 10mm long?. and correct on the X Sync In briefly talking to the guys at Chromag and NSB who will be making the X Sync rings for Chromag, the tooth profile is quite a bit more refined.

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