Re: Aluminum or Steel? Which do you prefer?
To me it all depends on your front tube.
If the stock motor mounts fit around it you are golden, if not then with steel you can just use channel locks and squeeze it in and not loose any strength.
With aluminum it is another story.
If you can crimp it to fit the mount you just put a huge failure point in your frame.
If it is that thin even drilling it for a single bolt mount is a failure point too.
If it is good thick aluminum no problem, you can drill it.
I had to do that on my current ride, but it is a heavy duty ALUXX-Grade Aluminum frame.
Hope that helps.