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 practice, rough surfaces, and for those who "just want a set to start with." [Contents] ・IHTH06W Pin tires with wheels x 1 set (for one car / 4 tires) [Compatible Models] ・Kyosho Mini Inferno series ※Please prioritize the photos for detailed compatibility information. [Condition] ・Unused / Stored item ※Please understand that there may be initial scratches due to storage. ※Bulk purchase welcome (can offer combined shipping discount)