[kav]

I'm considering some new wheels and would really like to stick to the stock size rims.

Stock
Front wheel 18 X 8 Offset 42
Rear wheel 18x9 offset 30

New Rims
Front wheel 18x8 offset 34
Rear wheel 18x9 offset 40

Using a wheel offset calculator it says that:
Front - Inner clearance 8mm MORE & Outer position EXTEND an extra 8mm
Rear - Inner clearance 10mm LESS & Outer position RETRACT by 10mm

What are your thoughts on the clearance with these offsets as well as overall stance?

After some feedback on another forum, I'm considering running the above setup with either 10mm spacer, to bring the rear out to stock offset, or 20mm spacer to move the rear out about 10mm to match the front.

I any advice you could provide quickly would be a huge help.