Reliable kid's bike with training wheels features thoughtfully designed geometry with formula racing element painting; For 3 to 4 years old with a recommended height of 33 to 37 inches Child-friendly CUBETUBE frame geometry positions the little rider in an optimal riding posture; Sealed bearings ensure a friction-free adventure for a smooth and effortless ride Extra-wide 2.4-inch tires make it easier to maintain balance even for a young beginner; 12-inch tires provide stability and traction for an exhilarating ride Equipped with shorter lever brakes perfect for small hands; Features front wheel caliper brake for effective speed reduction and rear wheel coaster brake that stops the bike when pedaled backward Handlebar and seat are height-adjustable to ensure good ergonomics and longer service life; Comes 95 percent pre-assembled, with an instruction manual and complementary tools needed in the box