I upgraded my wheels prior to delivery to the 21" Grey Turbines. I have my unused 19" Slipstream wheels and have been looking to sell. I never drove on them and the only miles they have are from Tesla factory testing and transportation to the Tesla deliver center (so less than 10 miles total). Looking to sell for $1,700 plus shipping or free local pickup/deliver in the Dallas/Ft. Worth area. I have corporate discounts I can apply to the shipping and will send at my cost.