>>1171114This man told me I could fix it with shims, apparently I can't. Anyway, the crank is made out of plastic, no wonder it creaks a lot. I don't have a tool to tighten it except for a pipe wrench (which is too big). I'll probably take it to the bike shop and get charged 5$ to tighten it and apply grease/wd40. Maybe I can get a tool, remove it, apply teflon tape on the thread and screw back again. I bet the creaking is caused by the plastic having some play inside the aluminum frame.
