Westley's Bleche-Wite (Thats how it is spelled on the bottle). I rinse the wheels and tires, spray this on the tires, and scrub with a coarse brush. Rinse that off then use a wash mitt on the wheels to get them clean.
I do this as my first step in my wash cycle. Wash the rest of the car, dry as needed then add some Meguiar's (Yes I use Meguiar's) Gold Class Tire Gel. I like the medium gloss myself but they make a high gloss too. Spread evenly and enjoy the nice shine!