I have an old Trek 8000 ZX that I am fixing up. I had to replace the bottom bracket and I believe I successfully did that. The bike did not have a crank set to work with so I salvaged one from a pile of other old bike scraps.
My problem is when I attached the crank arm and tried to spin the pedal, the smallest gear just rubs against the frame. It appears that the crank is too close the frame. It is just making contact 5mm would address the issue.I want to know what my options are. My initial guess is to find a crank set with smaller gearing and hoping to find one that fits. The other idea is try and get a spacer but I am not sure how safe that would be.
There are number of bikes available that I could steal parts from but I would like some guidance on what I should be looking for in terms of size. I am not sure of the age of the bike, but I am pretty sure the frame size is 21". The color is yellow if that helps.
I am sorry if some of my terminology is wrong/crude, I am new to bike repair/salvage (Having a blast though).
Thanks in advance.