These are 16" wheels that weigh 16 lbs each, my 17" oem wheels weigh 23.5 lbs each. I have already noticed a difference
. It is easier to get moving, acceleration is quicker, and I can shift up earlier. Although that last part may have something to do with the fact that the tires on the rims right now are 24.9" where my old tires were 25.5". The tires on these wheels right now are sporty tires, so I wont expect any improvement until I grab some 205/60/16 EP 422+'es.
New tire and rim combo should weigh 36 pounds each, old combo weighs 48 pounds each.