I have a 15t dura ace cog, 16t EAI cog, and 18t phil wood cog here in front of me.

I have only ridden the EAI and Phil and am impressed but hereis the question....

Is there a distinguishable difference between the dura ace and EAI cog. In race situations mainly. I am about to get a 14t and cant tell what the extra 10 bucks is going for on the EAI. Finish is different but they both feel solid. granted i havnt ridden the DA yet.

chime in...