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@johnnyringo
I had a fixed rear wheel on a previous frame. I purchased a new frame and wanted to use the same set of wheels (+cog) from the old frame. In order to ensure that there'd be no issues with chain alignment, I checked the width of the BB on the old frame and purchased a new one with the same width...the old BB measured 68-127mm.
Now, having put together all the parts on to the new bike, the chainline is well out:
I'm a bit confused as to why this is. I think maybe it has something to do with the tapering on the BB perhaps...meaning the chainring won't go closer to the frame???
I'm also concerned about whether it will at all be possible to get chain alignment with this frame. The chainring on there at the moment is a 48T. If anyone can suggest anything that'd be appreciated.