No assembly required as it comes with wheels. These pin tires with wheels are ready to use as soon as they arrive, a set of "4 tires" for one car. Recommended for driving on low-grip surfaces and rough roads, as well as for practice or spare stock. [Contents] ・IHTH01Y Pin tires with wheels x 1 set (for one car / 4 tires) [Compatible Models] ・Kyosho Mini Inferno series *Please prioritize the photos for details and compatibility. [Condition] ・Unused / Stored item *Please understand that there may be initial scratches due to storage. *Bulk purchase welcome (discount available for combined shipping)