Eighteen-inch wheels carry riders 47.2 to 59.1 inches tall, roughly 4 to 8 years old. The saddle travels from 24.5 to 27 inches on a quick-release lever, so the fit can be corrected in seconds when a growth spurt lands mid-season. Measure the child's inseam against that saddle height, since 23.5 to 26 inches is the window where both feet still reach the ground. Braking runs two ways: a front hand brake sized for smaller hands and a rear coaster brake that engages by pedalling backward. A fully enclosed chain guard keeps trouser cuffs and toes clear of the drivetrain, and two removable training wheels come off once balance arrives. The bike ships 85 percent assembled, leaving the handlebar, bell, pedals, training wheels and reflectors to fit, and the seat carries up to 145 pounds. Color: Pink; Frame Material: High carbon steel; Overall Dimensions: 50.5 in W x 21.5 in D x 30 in H; Saddle Height: 24.5 in to 27 in; Saddle Size: 9 in x 5 in; Inseam Size: 23.5 in to 26 in; Suitable Height: 47.2 in to 59.1 in; Suitable Age: 4-8 years; Wheel Size: 18 in; Seat Weight Capacity: 145 lbs; Net Weight: 24 lbs; Pre-assembled: 85 percent; Package Includes: 1 kids bike, 1 instruction