Originally Posted by gremlin75

The bolts are already taken care of. Using raceface spacers (they go where the old outter chainring sat) to make up the difference

only real question I have left is the BB length.

If my thinking is correct (and it rarely is!) to get the same chain line from from the new 1X10 set up with out the front derailleur (2.5mm spacer) as I had with the old 3x8 with derailleur I will need a 118mm length BB. In theory that will add back the 2.5mm on the drive side that I'm losing without the derailleur (moving the single chan ring back to the same spot the old middle rig was). It will also add 2.5mm to the non-drive side but that won't effect the chain line so I don't really care about that. Does that sound about right or is my theory completely wrong??