???? ??????? ??? ??? ????, ????? ???? ??? ???? ?????? ????, ???? ???? (?????? ?????), ???? ???. ?????? ???? ???? ??????, ????? ????? ?????? ??? ??? ??? ??? ?? ???? ?? ???????, ????? ???????? ???? ?? ??????? ??????? ??? ????.A whole new conventional of efficiency and durability 2nd to none. The upright riding stance in the QuadBoard and its modest f