Transform your GOTRAX hoverboard self-balancing scooter into a go-kart that’s off the charts! Takes only 10 minutes of assembly and is easy to learn how to operate with the simple handlebar steering technology. Fitting the HOVERFLY KART Hoverboard Go-Kart on self-balancing scooters is easy. The HOVERFLY KART boasts a universal design that can attach to most hoverboards featuring 6.5-inch, 8-inch, 8.5-inch, or 10-inch wheels. NOT COMPATIBLE with SRX MINI or LIL CUB HOVERBOARDS.