Bulldog Black Silicone Tires BRD7893
 
These Bulldog Racing AFX Mega-G+ medium compound silicone rear tires measure .448" in diameter when mounted on the stock AFX Mega-G+ rims (compared to .466" for the stock tires) which lowers the traction magnets closer to the track for better handling.
 
These tires can also be used on the Bulldog AFX Turbo/SRT/Brass Class chassis which are a little wider of a tire than the stock ones and measure .452" when mounted on the Turbo rear wheels.
 
General tire info:
Medium 
You get 2 Silicone rear tires