I recently coldset a mountain bike frame from 126 to 130. First time doing it, still need to align the dropouts. I'm planning on running a 135 hub in it, but I don't want to spread it much more, and from my test the frame needs only a gentle pull when installing the wheel.
I used the rod and nut method to spread the frame. I guess this steel is very elastic since I had to crank it out something like 165 before any noticeable change occurred!
I also have a new Surly karate monkey which is designed with their "gnot boost" spacing, which means I run a 148 boost hub in a 145 frame, and in theory I could also run a standard mountain 142. Steel is real
