Iron-Man 2 Boy's Bike (16-Inch Wheels) *10" Steel Frame, *Single Speed, *Rear Coaster Brake, Rear Caliper, *Training Wheels , *Chainguard, *Handlebar Pad & Faceplate, *Rear Fender Single speed bike includes removable training wheels Rear coaster brake makes stopping easy for new riders; front caliper brake for advanced riders Handlebar pad, enclosed chain guard, adjustable seat post Recommended for ages 3 to 6; assembly required