The 6.5" tire fits the smallest tire version of self balancing hoverboard models. This non-inflatable solid tire sports a tread that is perfect for hard surface riding.
Feels like a solid, great tire. Clean lines and mold. Not sure how it stands up to rough surfaces yet though.
I took a gamble ordering these, so for anyone else looking, these do NOT fit the Hover-1 Ultra. That's not monster scooters fault, they list compatibility, and I just hoped it would work.