Transformers Dynacraft Optimus Prime Boys BMX Street/Dirt Bike 16", Red/Black/Blue Boys beginner BMX street bike with coaster brakes Transformers lights and sound grip twist Adjustable/removable training wheels Lifetime warranty on frame and fork Bike Dimensions 6.75&quot; x 17&quot; x 36.25&quot;, 28 pounds Recommended Ages 4 to 8; up to 81 lbs.