I've work out my Blackspire chainring after many a year of use on street bikes and now my single speed stripped down commuter MTB.  Skippingchain now as some teetch are finally wearing down.

CRC are selling off certain sizes of the ring (and they are damned strong if they could taske me riding street on it and never having bent it.  Light too) 

Anyhow, I can't remember what I got last time, CD or ATB sizing.  I have 5 armed cranks and the ring says "neo" and "94/38" where the 38 is teeth number.  

How do I figure out whether I need to get the CD or ATB sized replacement? 

CD it is then, by that authoritative take on bike parts.

I'd love to make some comment about your user name which would only be understood by those who truly know me, but this being the Kit Forum is maybe not the best place !!!