Originally Posted by
peeweevinson
I’m using the middle and the granny, and put a chain guard on the outer. I went back to using the 113mm cup and cone bb, and everything looks like it’s lining up well. But, I just found out the 9 speed cassette I bought needs a spacer for the 8-11 hub I have. I’ve built a half dozen or so fixed gears, but this is the first geared bike I’m doing. Just trying to enjoy the process! I guess I’ll be back with a future question or two.
If you are using the granny and middle as a double, then you would want a longer spindle rather than a shorter one. It's good the way you have it, but your chainline is now based on the center between the two chainrings you've kept, not the chain guard.