Getting a 36 tooth chainring to run 2x9 on my SLX 660 cranks. Anyone know the difference between the two 36 tooth chainrings offered for the SLX 660 and SLX 665 cranks?
They have two different part numbers for the two 36 tooth rings and they are not compatible according to Shimano tech docs. Confused as to what will fit on what in the 36 tooth size.
Would any 36 tooth Shimano ring from say the FC761 or FC771 fit the SLX FC660 Crank?
I currently have the following crank: Shimano FC 660 with 22-32-44
I want to change the setup to a double with 22 or 24 and 36 tooth chainrings. There are two different chainrings for the SLX lineup. The chainring for the FC665 appears to have different tabs for the bolts than the 32 tooth for the FC660. To run the double on the FC660, do I need to buy the 36 tooth ring made for the FC665, or does it matter? Are the shift pins different on each 36 tooth ring? The stores say to buy the 36 tooth ring made for the FC665 if you want to run a 22-36 double setup, but I am not sure that particular ring will fit the FC660 crank because the photos show slightly different bolt tabs for each ring.
I am trying to avoid the annoying discovery that yet another Shimano chainring won't fit my current crank because of some small alteration of the ring.
Thanks in advance.
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