Don't want to be unfare to my 6 year old. Last year bought him a well used specialized hot rock 20, and for christmas bought a specialized hot rock 20in. six speed. The six spd is for family rides and long distance rides. The well used hot rock is for riding with the neighbors and jump it and everything else. To this day he is always riding the used one and the new one isn't getting rode at all except for once or twice a week. If that. Should I let him have the new one? I want him to use it before he grows out of it, and at this rate he will have barely ridin it. I want to be fare to him and still have a good bike to ride on out family outings.