I have a bicycle with a 6061 aluminum frame. I had to replace the rear wheel, and I bought a wheel with an axle length that is a few mm short for the dropout spacing.
In order to fit the axle into the frame I would have to "squeeze" the dropout about 4mm. Currently the outer dropout of the frame is 144mm, and everything seems to fit if I squeeze it down to 140mm.
I have already ordered a longer hub axle, but it will be at least 2 weeks until I get it, and I would like to ride my bike with the squeezed frame until then. I know that in general, it is not a good idea to bend or even squeeze aluminum frames, but I am not sure those measly 4mm will make that much of a difference.
So, my question is:
Considering this is an aluminum frame, will the 4mm dropout squeeze cause damage in the long-term or maybe breakage? How safe is this?