All the bleach will do is get rid of the 20+ years worth of staining which obviously shows up more on a white pair. There are stickys on how to restore Tuffs but here's what you need to do in a nutshell.
Sand down any scuffs or gouges
Remove axles and bearings etc
Scrub scrub scrub (or pop them in the diswasher)
If they look minty then
if they look a bit faded......
Get a bucket with a 20" base
Pop the wheel in, cover with boiling water, add 2 tins of
Dylon Multipurpose dye (to penetrate the nylon)
Stir for 30 mins
Hey Presto back to new
Repeat per wheel
Remember, you can dye a white wheel most colours, you can only
re-dye a coloured wheel back to it's original colour.
Ok, so you can probably turn yellow Tuffs to Orange but I'm not getting into a long colour realted debate here.