96mm wheels provides more comfort to the riding on the rough roads, but reduce the torque of the board compare to the 85mm wheels. 85mm wheels provides more torque in acceleration, while 96mm wheels give you more comfort on rough roads. 

The back sleeves are special designed to fit Backfire motors for certain models only.  So these particular wheels and sleeve fit G3 PLUS, G3, MINI and G2 BLACK,   BUT NOT fit: G2T or Other G2 models since 2017.