I like the bleach white product as well. cleans away all the brake dust, road grime, grease, oil,etc. spray it on, use a stiff brush to work it into a big soapy lather, let it sit a few minutes, spray again with the bleach white, another quick wipe (incase the lather started to dry) then hose it off.

tires will dry and have that flat black, clean new look to them, and your white letters/stripes will be stark white.