I am going from some terrible 17" plastic cap wheels to some, what I believe are, newer FX4 20" with pirellis but I'm unsure what they came on originally. I obviously don't want to use the current open lugs that are zinc coated and ugly. Does anyone have the exact size for the stock lugs or a part number? I'm not sure exactly what year these rims are from but they are fairly new. Tires still have the nubs. I know they are M14x2.0 but need to know the length.

Thanks!

New wheels: