Can anybody answer this, I've looked at a few sources but they don't address this specific question...
With a 3 ring setup the middle ring is aligned with the middle of the cassette for the most effective chainline. I want to convert to a 2 ring setup and it seems to make sense that the middle of the cassette should align directly between the two chainrings. This means that simply removing either the outer or inner chainring will result in a chainline that doesn't achieve this.
Initially I thought I could just remove a bb spacer (x-type) but x-type axles are generally fixed length so this approach doesn't work. If it helps, I'm running a Race Face Deus XC chainset with 104 bolt circle diameter.
Has anybody done this? Are there special chainring bolts that act as a spacer?
Any help appreciated.