12x5mm Mclaren F1

Tires are 12x5mm with a 0.8mm axle hole. 
You get 2 wheelsets in this order.
You still have to paint these yourself; that goes for everything on Shapeways.com.
Shown on a HotWheels with clipped stock axles.
If you don't want to open the model; you can cut  off the plastic wheels, but preserve as much of the stock axles, then trim to fit these. I use washers to space the wheels often.  Or use poster putty to pose steering and camber.