Originally Posted by
notzofast
Large.
22 tooth tool is the bottom bracket tool.
I'm asking if I can use bb tool to rotate bottom bracket either in or out (left or right) and via doing so adjust how far the cog (front gears, the tripple) is away from the frame, and thus alter my chain line?
I get this idea because bottom bracket (the shiny part in the picture) is protruding more from the side of the front gears and less from the side opposite to it, the left.
The problem is you are cross chaining, and all bikes just don't perform well at the extremes. If you can ride on the big/big combination and it stays in gear, even when you back pedal, go ahead, it just isn't recommended. To keep it from shifting when you roll it backwards, just don't roll it backwards.
The solution is to ride on the middle CR. You will be able to have exactly (if not, very close) the same gear as the big/big combo, but it will give you much more flexibility in shifting up or down.