For your R8, we recommend the P101, P200 (pictured) or RS100 (pictured) Wheelsets. They are available in either 20 or 21 sizes with 9 inch fronts and 12 inch rears.
HRE P101, P200 & RS100 Wheels for the Audi R8 Gen2 Pre-Facelift (2016-2019)
Fitment Details: Audi R8 Gen2 Pre-Facelift (2016-2019)