El Oso Niño 20

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 inches tall, aged approximately 4-9 years old.


  • Frame
    20" Hi-Ten Steel Junior Fat Bike, for Disc Brake Only
  • Fork
    20" Hi-Ten Steel Junior Rigid, w/ Disc Tabs
  • Rear Derailleur
    Shimano Tourney FT35, 7 Speed
  • Shifter
    Shimano Tourney RS35 Grip Shift, 7 Speed
  • Crank
    152mm Steel w/ 40T Single Ring
  • Bottom Bracket
    Square Taper - 5pc
  • Cassette
    Shimano Tourney TZ21 7 Speed Freewheel,14-28T
  • Chain
    KMC 7 Speed
  • Brakes
    Apex Mechanical Disc, w/ 160mm Front /160mm Rear Rotor
  • Rotors
  • Seatpost
    Steel 27.2mm
  • Saddle
    Padded Jr. Diamondback
  • Handlebar
    Alloy, 560mm Wide, 22.2mm Bar Bore
  • Stem
    Promax 90mm
  • Grips
    DB Kraton
  • Headset
  • Wheels
    32h Jr Fatty Alloy
  • Wheel Size
  • Hubs
    Steel 32h Disc, 3/8" Nutted, 135mm OLD
  • Tires
    Chaoyang 20x4.0"
  • Miscellaneous
    Tool Kit
More Info
Mountain bike pricing and specifications are ever changing. This info was last updated August 16, 2021.
See something we missed?

Get the email for busy mountain bikers.

Discover the best products + gear, and learn about deals from brands you love.


Rated 0.0 out of 5
0.0 out of 5 stars (based on 0 reviews)
Very good0%

Your first-hand experiences really help other mountain bikers. Thanks!

There are no reviews yet. Be the first one to write one.