Best way to clean tired aluminum wheels ?

ZEP-ALUM. Be careful or it will start to etch the aluminum. My boss uses this stuff on various metals and it is amazing what will just wash off with a presure washer. It is acid and will eat your clothes and hands if not protected. he uses a bug sprayer to apply, then washes it off with a pressure sprayer. it will take rust off of chrome as well.
He calls this the acid bath. I did this once tho, and got a phone call while it was on my wheels and it started to etch them, so no interuptions. good luck.