Originally Posted by
alleyooptroop
i think i'm going to go with the rd as it seems to be more of a true track crankset as opposed to the xd which i read is suitable for both road and mtb. i'm gonna start with a 16t cog as i got one free from a buddy and see how it feels. thanks guys.
I wouldn't call the RD any more of a "true track crankset" than the XD. They're both road cranksets meant for multiple chainrings, and the main practical difference is 130mm BCD on the RD (designed as a double) vs 110mm BCD XD (designed as a triple). That's not a slam on these cranks, since track cranks are overkill for most riders and this is a conversion -- I wouldn't waste the cash on "track cranks" for a non-track bike.