what is the biggest tire size i can fit on the 2002 acura tl base model?????

 

You mean in the stock wheel or a different wheel altogether?

 

Yeah, what do ya want.....larger rim diameter sizing, 20" ?
Are ya looking for widest low profile tires or tallest height in being largest tire size ???
Check the many online tire sites for available sizes. They have really good cross referencing info for upsizing your stock oem tire size.

 

well i work at a car and truck shop i have stock 16 inch wheels on it i have 2 free tires that i got from a customer and just trying to see if they will at least fit the rear? the size of the new tires are 245/50/16!

 

Thats way to wide for the stock 6.5" wide rim.

 

For free, but that would be a bit over-stretched !
Take them, and trade or sell the tires for some quick cash.