I know wrong forum but I'll get a quicker response here. I sold my staggered rims from my GS to my friend who has an all wheel drive is250. What size tires can he put up front to match the height of the rears which are 275/30/20?

 

It is not recommended period.
If you are 100% sure the overall tire circumferences are the same, then it is possible but still not recommended.

 

i would ask tirerack they helped me out with diff tire size i could use. and the lexus is a 30/70 not 50/50 AWD so yeah you can go stagger safely as long as you stay in the diameter %