If i wanted to run an 18 x 9.5 wheel, what offset would i need for a flush fitment? And would i have to get my fenders rolled?

 

Try this and play with the numbers.

https://tiresize.com/wheel-offset-calculator/

 

I have rpf1’s 18x9.5 +15. My fenders are rolled. I have zero wheel gap and the distance from the rim lip to my fender is about 2.5”. It pokes by a few millimeters on natural camber without a camber kit. I think +22 would be flush on natural camber and will def be my next choice when i upgrade. 18x9.5 +22 is a popular wheel size for evo x’s so you’ll have a lot of options.

I would say flush fitment and rolling fenders go hand n hand unless u plan on staying near stock height. So if u want a flush fitment it really depends on how low you are. And it’s easily corrected by buying adjustable arms.

 

I've gone thru a few sets of wheels but my fav setup is 18x8 (+20something I can't remember exactly). I'm also lowered on tein coils. The fronts were perfect fits and for the rears I added 15mm spacers to sit flush. Also it depends on what tire size you're running. I'd definitely get the fenders rolled too. When I was running 19x9.5 on stock suspension, I was rubbing all the time.