factory 20"

I have factory limited 20" and would like to keep them for now on my 2008 limited crew max 4x4 I have a 3-1 leveling kit installed I am wanting to put 295/65/20 or 35/11.50/20 nitto ridge grappler on what spacer would I need to run my factory wheels for now and which size would be best of the two thanks

 

I can tell you a 285/65/20 (stock wheels) will fit without rubbing on the UCAs or the fenders. (barely). the 295s are 10 mm (~.4" wider), so it seems like a ½" or wider spacer would work to avoid rubbing the UCA. that said, your proposed tire will also be just slightly taller than mine, so you may end up having to do some very minor wheel well trimming.