El Oso Niño 20"

Assembly Options Professionally assembled by your local dealer, or DIY the assembly - its up to you!
Financing Available Buy Now, Pay Later with Klarna. We’ve partnered with Klarna to offer flexible payment options to pay over time.
30 Day Returns Our love your ride guarantee – if you’re not 100% happy with your bike, we’re not happy either. Click here for more details
Frame Warranty Covered for at least 5 years! Check out the details to see if your bike qualifies for longer.
Mechanical Disc
Tire Size
Frame material

El Oso Nino is our 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
  • Product ID 3917
Frame Size 20" 44"-55"
Rider Height -
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
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