Diamondback  El Oso Nino 20 Kids' Fat-Tire Mountain Bike

$499.93Compared to $650.00*Save 23%
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Color: Green Gloss
$539.93
$499.93
Size: 20 IN
Quantity
Shipping restrictions apply.
$85 oversize shipping applies.

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This bike is made for kids who want to monster-truck over everything in their path. The kids' Diamondback El Oso Nino fat bike fits riders 44–54 in. tall, aged approximately 4–9 years old.

Features

  • This little bear's frame and fork are made from high-tensile steel for a smooth ride that's tough enough for prowling the neighborhood and the woods
  • 4 in. wide tires offer amazing grip and sit atop 20 in. 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
  • Apex mechanical disc brakes with 160 mm rotors front and rear provide great stopping power, allowing riders to go wherever the trail or their imagination takes them
  • Shimano Tourney 1 x 7 speed drivetrain with Revo Grip Shift has 7 speeds to keep shifting simple and easy to master; Shimano grip shifter lets them charge up hills
  • Specs and images are subject to change

Imported.

This bike comes with Coast to Coast Support, which includes:
  • 1 year of free adjustments (see more below)
  • In-store bike assembly
  • Pickup in store or curbside
  • Bike experts available at 170+ bike shops
REI Co-op Members get more:
  • 20% off shop services
  • Free tubes with purchase of flat tire repair (Co-op Cycles brand tubes only; tube must be installed at time of purchase)
More about our free adjustments:
New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.

View all Diamondback Kids' Mountain Bikes

Technical Specs

Item #200570
Best Use

Mountain Biking

Mountain Bike Style

Fat-tire

Frame

Hi-Ten steel

Fork

Hi-Ten steel rigid

Bike Suspension

No Suspension

Crankset

152 mm steel arms with 40T Single Ring

Bottom Bracket

Square Taper - 5pc

Shifters

Shimano Tourney RS35 Grip Shift, 7 Speed

Rear Derailleur

Shimano Tourney FT35, 7-speed

Rear Cogs

Shimano Tourney TZ21 7-speed Freewheel, 14-28T

Number of Gears

7 gear(s)

Brake Type

Mechanical Disc Brake

Brakes

Apex mechanical disc, with 160 mm front and 160 mm rear rotor

Brake Levers

Alloy lever

Rims

Jr Fatty Alloy, 32 h

Front Hub

Steel 32 h disc, 3/8 in. nutted, 135 mm OLD

Rear Hub

Steel 32 h disc, freewheel, 3/8 in. nutted, 180 mm OLD

Wheel Size

20 inches

Tires

Chaoyang 20 x 4.0

Tire Width

4.0 inches

Handlebar Shape

Riser Bar

Handlebar

Alloy, 560 mm wide, 22.2 mm bar bore

Stem

Promax 90 mm

Seat Post

Steel 27.2 mm

Saddle

Padded Jr. Diamondback

Pedals

9/16 in. resin platform

Headset

Threadless

Chain

KMC 7 Speed

Weight

30 pounds

Bike Weight

Bike weight is based on median size, as sold, or the average of two median sizes.

Gender

Kids'

Size Chart

20 IN
Height Range3'8'' - 4'7''
Reach345
Stack445
Effective Top Tube508
Seat Tube Center-Top254
Standover Height576
Head Tube Length115
Head Tube Angle (degrees)71
Seat Tube Angle (degrees)70
Bottom Bracket Height240
Wheelbase927
Chainstay380
Fork Offset45

Sizing Notes

Measurements are stated in millimeters unless otherwise indicated.

How we measure bikes

  1. Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.
  2. Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
  3. Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.
  4. Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.
  5. Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.
  6. Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
  7. Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
  8. Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
  9. Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
  10. Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
  11. Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
  12. Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.

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