I have two 21" wheels from my R1T for sale. They are in great condition with about 11,000 miles on them. There are no scratches or curb rash. I also have the aero inserts. I haven't measured the tread depth, but there is plenty of tread left - probably about 1/2. I'm selling these as full size spares for $450 each. That's more than 50% off new. I will consider shipping to other locations, but would prefer local sales.