Assembly tutorial video located beside the images; with a Denim Blue hardtail frame and 21 speeds to conquer the trails, the Huffy Stone Mountain is ready for outdoor adventures; just follow the steps in our product manual An exclusive: Ideal for ages 13 and up and a minimum rider height of 5 feet; durable steel frame backed by our limited lifetime warranty (see owner's manual); suspension fork handles bumps and dips for a smoother-feeling ride The indexed Shimano TZ-31 rear derailleur combines with the micro-shift twist shifter to deliver 21 speeds on-demand for uphill climbing, downhill riding, or pure acceleration; removable rear derailleur guard ensures consistent gear operation 26" X 1.95" knobby tires tear into dirt bike paths with ease; linear pull hand brakes deliver consistent stopping action; premium padded ATB saddle has stitched sides for lasting quality; alloy quick release provides easy seat height adjustment Slight-rise handlebar enables upright riding to minimize back and shoulder strain; ATB-type resin pedals on the 3-piece crank have responsive feel; Kraton grips remain comfortable to the touch; alloy wheels in matte black; kickstand includedHuffy Hardtail Mountain Bike, Stone Mountain 26 inch 21-Speed, Lightweight, Dark Blue