I don't know what you mean by +32mm sorry, if you're referring to the offset 6UL's only come in +36.
You'll need the guards rolled if you want to run 225/XX/15 with 6UL's, with or without the spacers.
On full lock you might scrub on the inside without spacers.

Honestly it depends on alot of things such as just how lowered is it, how much give you have with your suspension, do you have a camber kit at all (i.e a proper camber kit not some stupid hellaflush fitment piece of crap).

If you want to bolt the wheels on with no problem at all and no modifications stick to 215/XX/15.