2020 Diamondback

El Oso Niño 20"

A 20″ steel frame general youth bike with mid-range components and mechanical disc brakes.

Manufacturer Price

$575
FrameSteel
SuspensionRigid
ForkSteel
Wheels20″ Aluminum
Drivetrain1 × 7
GroupsetTourney
BrakesMechanical Disc
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Insights
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

17 mph

El Oso Niño 20"

18 mph

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Highest gear

(descending)

Reviews
Bicycling
The Diamondback El Oso Is an Affordable and Rad Fat Bike

Feb 2018

Want to steamroll over terrain regular bikes can't conquer? This line of fat bikes is a great bargain—and there's even a mini-version for your sidekick.

Read Review

Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
Frame

20" Hi-Ten Steel Junior Fat Bike, for Disc Brake Only

Fork

20" Hi-Ten Steel Junior Rigid, w/ Disc Tabs

Bottom Bracket

Square Taper - 5pc

Headset

Threadless

Stem

Promax 90mm

Handlebar

Alloy, 560mm Wide, 22.2mm Bar Bore

Saddle

Padded Jr. Diamondback

Seatpost

Steel 27.2mm

TypeRigid

Pedals

9/16" Resin

Grips

DB Kraton

Groupset
Rear Derailleur

Shimano Tourney FT35, 7 Speed

Crank

152mm Steel w/ 40T Single Ring

Shifters

Shimano Tourney RS35 Grip Shift, 7 Speed

Cassette

Shimano Tourney TZ21 7 Speed Freewheel,14-28T

Chain

KMC 7 Speed

Brakes

Apex Mechanical Disc, w/ 160mm Front /160mm Rear Rotor

TypeMechanical Disc

Brake Levers

Alloy Lever

Wheels
Rims

32h Jr Fatty Alloy

Spokes

14g Steel

Front Hub

Steel 32h Disc, 3/8" Nutted, 135mm OLD

Rear Hub

Steel 32h Disc, Freewheel, 3/8" Nutted, 180mm OLD

Tires

Chaoyang 20x4.0"

Rider Notes
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Last updated February 24
Not listed for 1,150 days