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Diamondback El Oso Niño - 20" Fat Tire Kids Mountain Bike

El Oso Niño - 20" Fat Tire Kids Mountain Bike

Regular price $399.00
Regular price $650.00 Sale price $399.00
Sale Sold out

El Oso Nino is the world's smallest fat bike, made for kids who want to monster-truck over everything in their path. Four-inch wide tires sit atop 20"-inch wheels, making for a unique style and ride. Low tire pressure allows the bike to grab every bit of traction available, with extra float for soft surfaces and sand. This little bear’s frame and fork are made from high-tensile steel, tough enough for prowling the neighborhood and the woods. It’s got a seven-speed Shimano grip shifter to charge up hills, and powerful disc brakes for control, allowing riders to go wherever the trail or their imagination takes them — maybe even to the moon! This model fits riders 44”-54” tall, aged approximately 4-9 years old.


  • BIKE FRAME: 20" Hi-Ten Steel Junior Fat Bike, for Disc Brake Only
  • BIKE FORK: 20" Hi-Ten Steel Junior Rigid, w/ Disc Tabs
  • BIKE HEADSET: Threadless
  • BIKE CRANKS: 152mm Steel w/ 40T Single Ring
  • BIKE BOTTOM BRACKET: Square Taper - 5pc
  • BIKE REAR DERAILLEUR: Shimano Tourney FT35, 7 Speed
  • BIKE SHIFTER: Shimano Tourney RS35 Grip Shift, 7 Speed
  • BIKE COGSET: Shimano Tourney TZ21 7 Speed Freewheel,14-28T
  • BIKE CHAIN: KMC 7 Speed
  • BIKE FRONT HUB: Steel 32h Disc, 3/8" Nutted, 135mm OLD
  • BIKE REAR HUB: Steel 32h Disc, Freewheel, 3/8" Nutted, 180mm OLD
  • BIKE SPOKES: 14g Steel
  • BIKE RIMS: 32h Jr Fatty Alloy
  • BIKE TIRES: Chaoyang 20x4.0"
  • BIKE BRAKE LEVERS: Alloy Lever
  • BIKE PEDALS: 9/16" Resin
  • BIKE HANDLEBAR: Alloy, 560mm Wide, 22.2mm Bar Bore
  • BIKE GRIPS: DB Kraton
  • BIKE STEM: Promax 90mm
  • BIKE SEAT: Padded Jr. Diamondback
  • BIKE SEATPOST: Steel 27.2mm
  • BIKE EXTRAS: Tool Kit
  • BIKE BRAKES: Apex Mechanical Disc, w/ 160mm Front /160mm Rear Rotor


Rider Height 44"-55"
Bike Stand Over Height 576.0 mm
Bike Seat Tube Length 272.0 mm
Bike Top Tube Length 508.0 mm
Bike Head Tube Length 115.0 mm
Bike Head Angle 71.0 °
Bike Seat Angle 70.0 °
Bike Wheel Base 927.0 mm
Bike Chain Stay Length 380.0 mm
Bike Fork Offset 45.0 mm
Bike Stem Length 90.0 mm
Bike Handlebar Width 560.0 mm
Bike Crank Length 152.0 mm
Bike Seat Post Length 260.0 mm