How big?

I'm running 18x8.5 with 235-40's for now. !afro

I've got 20 x 8 Monderas with 275/45/20 Toyo Proxies, But will have to get much smaller tires when the bags go on.

20x8.5 kmc clockers.... 245/35/20

17"kmc venoms for now

*sigh*...time for another dumb question

Anyways, im about to lower my R/T 4/5. I have Boyd Coddington Smoothie II 17x8's with +37 Offset and 6" Backspacing. I plan to run 245/40/17's and 255/40/17's out back. Does this sound alright? As previously stated, I tried going with an offset close to around +42 as much as I could..but then again, I know I aint gonna be tucking. I just dont want these bastards sticking out like neg's