Insane Bicycle Mechanic
Join Date: Mar 2008
Location: other Vancouver
Mentioned: 5 Post(s)
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Quoted: 124 Post(s)
Originally Posted by Jakedatc
Does it matter if it's 9-10 speed or meant for a double compact as long as it is 110 bcd?
No. 110mm BCD is 110mm BCD. (Except for Campy compact.) 9/10 speed rings may be configured to have a smaller gap between the adjoining rings, which may or may not affect you.
, if I understand your original post, you're looking at making a 28-36-50 triple. This may not work because the chain will want to shift from the granny to the big chainring without landing on the middle. This is because the front derailleur pushes the chain sideways, and with those chainrings it'll contact the big ring as well as the middle. You'll end up making a double shift: granny-to-big then big-to-middle when you want to just go to the middle ring. This is annoying and frustrating.
Shimano sold those cranks in a couple different configurations originally: 26-36-46, 28-38-48, and 28-44-50, IIRC. If you want a smaller middle ring, you should seriously consider putting a smaller outer ring also.
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