Unsprung weight as it specifically applies to your wheel / tire combo.

A quick search shows 16x8 Enkei RPF01 around 14 # Toyo R888 in 255/50 r16 are 26#. For a combo of 40#.

So in a typical A,B,E Mopar weight loss of 20% on each corner is significant savings and lap time saver over a typical 50# combo.

Any thoughts on this aspect from those that might have imperical evidence on this?