12" 14" 16"18"4 sizes steel spoke'd wheels with extra strong pneumatic tyres. Chromoly steel Frame with Front Fork Free sports drink bottle and holder. Manufacturered by Axdwfd. Adjustable handlebar height adjustable seat height Front calliper brake and rear band brake. Heavy duty removable adjustable stabilisers simply high or low stabiliser's wheels postion for different stage of learning. This sporty bike for boys and girls comes with training wheels and a quick release seatpost which makes it easy to adjust the height of the seat .