Question: Largest tire size on stock C6 rims?

[A-Pex]

Hey Folks! Bottom Line Up Front (BLUF): I've got two questions regarding tire size and match. 1) What's the largest tire size that I can fit on the rear stock rims and ride hight/bolts for a C6? 2) Is there any real issue (documented proof prefered) with different front/rear tire matching? Meaning, can I run PS2's on the front and Nitto's or BFG KDW's on the rear? If not, why not, and can you prove it or reference some authoritative source? As a side note, I'm sure this topic has been covered before, but I couldn't find anything becase I think something's screwy with the search function today. No matter what I typed in the search window, I kept getting the same results. Now that that's cleared up... After a whopping (note the sarcasm) 7 months (and 6K miles), my Pilot Sport 2's are bald in the rear. Suprisingly, (again, note the sarcasm) this is not the case in the front. With the amount of wear in that amount of time/milage you would think that I spend my time with my right foot firmly placed on the floor board, but I really don't think I push it that hard and I rarely spin the tires. Thanks in advance for your insights!