Originally Posted by
AlmostTrick
The original narrow spaced bikes are (of course) built with the chainring(s) centered with the cogs on the rear hub. When you spread the frame for wider hubs, with more cogs to the right, doesn't this throw off the chainline, which is now no longer properly centered?
there are also more cogs to the left, so it stays balanced. Certainly, there are more extreme angles to be had with large/large and small/small.