Here are the specs of the 8.5 width wheel. Would these work good with the 305/55/20s? Or should i go witht the tires that 4 wheels parts has, 285/55/20? Thanks for the help!

20x8.5, 6 on 135 / Bolt Pattern; Back Spacing = 6.13 in.; Offset = 35; Hub Bore = 87.1; Finish = Black

 

Either tire should work with that wheel.

 

How far will those wheels stick out compared to the stock ones? I want them to be out a little, but not out so far that i need fender flares.

 

An 8.5 inch wide wheel with 6.1 inches of backspacing is gonna stick out about 1/2 inch farther than the OEM wheels.