In front I have 225/35/20 but that size is hard to find - so thinking to go 245/35/20 or 245/30/20. Think 35 will have rubbing issue? Is anyone running above sizes and what is your result? I am running 275/30/20 in rear going up from 255/30/20. Thanks for your help!

 

275 in the rear will be pretty risky to have unless you have a high offset wheel, it will be pretty darn close to rubbing if not rubbing on most setups. The 245's up front is pretty wide as well.

I have Michelin Pilot Super Sports, which run on the wide/square side in 235/35/19 (Front) and 265/30/19 (Rear).
With 19x8+30 (including 5mm spacer) up front, there's a slight minor rub on dips on the plastic fender liner.
With 19x9.5+39 in the back, the 265's rub on rear tapered bumper portion on major dips.

This is on RSR Down springs.

Hope it helps

 

Thanks Lex! Since you are lowered that may be diff from me with stock suspension.

 

Oh you should probably be okay on stock suspensions as you'd have more suspension travel.
There should be some ppl on here with stock suspension and 20's, so hopefully they'll chime in

 

Ive got a 20inch Rim 20x9 upfront +38 offset and 20x10 in the rear with +45 Offset.

i have 235/35/20 Front with RSR half down Springs (Approx 1.2 inch lower) there is tiny bit rub when i turn the wheel to make a U turn or take a hard turn. other than that its perfect.

and in the rear i have a 255/30/20. no rub at all (also RSR half down Springs Approx 1.4inch lower)
the 255 gives the rim a better look and it will stretch as well. the ride is smooth but u will feel the road much more of course with tires as thin as 30mm and 35mm.

Hope Ive helped