I understand but no production literature touts the Z51 wheels as being forged which is quite uncommon. Manufacturers usually always call out forged as a differentiator. It's quite possible things changed between pre production, when the PowerPoint slide was made, and real production. It's also interesting that the Z51 wheels have a list price not too much higher than the base wheels, something that also points to them not being forged. I know the forged SRT 20" wheels I had on my Jeep were $1500 each, the Z51 wheels are half that price at full MSRP.Heard a presentation by Tadge, showing a PowerPoint slide, in which he said Z-51 wheels are forged, unlike base wheels which are cast. He added, that is why the weight difference, despite their 1" diameter difference (base vs. Z-51), is very small.