Daimondback created the Oso Nino 20″ fat bike with riding enjoyment as their number one priority. The Fat bike tires float over rough terrain and provide unrivaled traction in all conditions. Paired with a Shimano 7 speed grip shift groupset and mechanical disc brakes, the Oso Nino gives kids unparalleled control while they build their skills and become more confident on the bike. The adventures upon this bike are endless, so sit back and watch as your kids take off, guided by their imagination. Features: Hi-Tensile Steel frame with integrated disc brake mounts 20 x 4″ Fat bike tires provide an unrivaled amount of traction 7 Speed Shimano gripshift drivetrain familiarizes kids with shifting Mechanical disc brakes keep all of the traction under control Designed to fit riders between 44″ – 55″ tall (roughly 4-9 years old) Specifications: Frame: Hi-Tensile Steel Junior Fat Bike (20″) (Disc) Fork: 20″ Hi-Tensile Steel Rigid (Disc) Headset: Threadless Handlebar: Alloy (22.2mm) (560mm Wide) Stem: Promax (90mm) Brake Levers: Alloy Levers Brakes: Apex Mechanical Disc (160/160mm) Shifter: Shimano Tourney RS35 Grip Shift (7 Speed) Front Derailleur: – Rear Derailleur: Shimano Tourney FT35 (7 Speed) Crank: Steel (40T) BB: Square Taper (5-Piece) Cassette: Shimano Tourney TZ21 Freewheel (14-28T) Chain: KMC 7 Speed Pedals: 9/16″ Resin Seat: Diamondback Padded Junior Seatpost: Steel (27.2mm) Rims: Alloy Fatty JR (32H) Front Hub: Steel (Nutted Axle) (135mm OLD) (Disc) Rear Hub: Steel (Nutted Axle) (180mm OLD) (Disc) Spokes: Steel (14g) Tires: Chaoyang (20″ x 4.0″) *Note: These bikes are fully built by our expert bike builders, then partially disassembled as needed for shipping. Bikes will arrive to you with some basic assembly still required.