These are tough ABS plastic wheels, which are featured in the DB01RRR chassis kit (Item 84221). They are great for use on high-grip surfaces such as carpet and asphalt. These wheels may be used on some of Tamiya's other platforms with the use of the separately sold Tamiya HEX hub Hop-up-Option.

Rear 2WD 4WD ABS Dish Wheel x2
Features hex hub attachment.
Compatible with TRF201, TRF211, DN-01, DB01, DB02, TRF511 and TRF502X chassis cars with the use of the separately sold HEX Hub Hop-Up-Option (item 54668)