?Features? ?Sport bike for boys and girls. Coming with bell,tools,water bottle and training wheels,owner’s manual included. ?Easy to put together! 95% of the bike is assembled, only need install training wheels, pedals,handlebar and saddle. Almost anyone can make it. ?Sturdy steel frame,wide knobby 2.4′ aired tyres.A sportive,durable and comfortable real bike.?Front caliper brake, rear coaster brake.18 inch – dual hand brake The combination of brakes gives many options for learning to stop.?Heavy duty long last training wheels. Royalbaby patented design with side support, never bent.?Quick release seatpost, easy to adjust the seat height for fast growing kids.?One piece crank,ball bearing drive shaft,full enclosed chainguard(18 inch half enclosed).Easy rolling and more protection in details.?How to choose the right size?? ?12 inch suitable for child, whose height 33′-41′, age 2-4 yr old. ?14 inch suitable for child, whose height 36′ – 47′, age 3-5 yr old. ?16 inch suitable for child, whose height 41′ – 53′, age 4-7 yr old. ?18 inch suitable for child, whose height 43′ – 59′, age 5-9 yr old.