Finally ordered Roderick RW5's in 19s, spacers? tire size to not chew up the diff?
 

So I finally pulled the trigger on the 19s. I think they are ET 40 and 45. Should I run spacers to flush them out a lil? What size is safe and any good cheap places to get em? Also I was gonna run the 305/30 R and 245/35 F Hankooks are these the proper sized tires to have the correct ratio (similar or same as stock) to not ruin the cars differential? TIA