Loving these new shoes on my Camaro! These are the 20 forged aluminum rims on the convertible just in black. Bought them on Ebay at the link below.
http://www.ebay.com/itm/252238041611...%3AMEBIDX%3AIT
So I put my amateur home scale weighing to the test. Here are my results.
5 spoke black front 8.5" - tire&rim - 61.2 pounds
5 spoke black back 9.5" - tire&rim - 64.4 pounds
Convertible black front 8.5" - tire&rim - 55 pounds
Convertible back back 9.5" - tire&rim - 58.6 pounds
Front tires and rims are 6.2 pounds lighter each
Back tires and rims are 5.8 pounds lighter each
Total of 24 pounds off tire weight.
These are unofficial amateur home scale numbers so take it with a grain of salt

I double checked these numbers a few times but not sure why the fronts weight less.