20’s backspacing

[gdaddy1]

Getting ready to order some shoes. I’m going with 20x10 on rear and 20x8 on fort. What backspacing and offsets work the best. I’m thinking 5” ba and no more than 10-15 neg offset.
We did a 4-6 drop with spindles and flip kit. I just do t want rubbing issues.

 

[xm20k]

Not running 20s now but when I was.
4/6 drop
Front 20x8 4.5" BS with a 245/40
20x10 5.75" BS with a 275/40

Tires looked pretty equal in the wheel openings ie. top of the wheel opening at about the same height on the tire front and rear.