Even though the wheel weight is low the tire weight is going to be a lot still. My Rota 17*7 weigh 17.5lbs but the wheel tire combo comes in at 42lbs. Making the tires in 215-45-17 24lbs each.

Have you been able to find anyplace that sells the Centerlines yet? I was looking at another one of their wheels a while back and couldn't find anyone to give me offsets.