The Ultimate Guide to Buying a Kids' Bike
Austin, TX
Diamondback El Oso Nino 20 Kids' Fat-Tire Mountain Bike
$389.93Compared to $650.00*Save 40%
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.
Key Details
Wheel Size
20 inches
Number of Gears
7 gear(s)
- 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
- NOTE: Specs and images are subject to change based on component availability
Imported.
This bike comes with Coast to Coast Support, which includes:
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' Bikes- 1 year of free adjustments (see more below)
- In-store bike assembly
- Pickup in store or curbside
- Bike experts available at 170+ bike shops
- 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)
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.
| Best Use | Mountain Biking |
|---|---|
| Frame | Hi-Ten steel |
| Mountain Bike Style | Fat-tire |
| Bike Suspension | No Suspension |
| Fork | Hi-Ten steel rigid |
| 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' |
Diamondback Bikes (200570)
| 20 IN | |
|---|---|
| Height Range | 3'8'' - 4'7'' |
| Reach | 345 |
| Stack | 445 |
| Effective Top Tube | 508 |
| Seat Tube Center-Top | 254 |
| Standover Height | 576 |
| Head Tube Length | 115 |
| Head Tube Angle (degrees) | 71 |
| Seat Tube Angle (degrees) | 70 |
| Bottom Bracket Height | 240 |
| Wheelbase | 927 |
| Chainstay | 380 |
| Fork Offset | 45 |
Sizing Notes
Measurements are stated in millimeters unless otherwise indicated.
How we measure bikes
- 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.
- Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
- 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.
- 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.
- 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.
- Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
- Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
- Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
- Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
- Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
- Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
- 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.
Buying Advice
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Coolsavage
Great with some issues
1 year ago
Very good bike, it just takes a lot of work to start up with it, all of the gears work, but some gears make a vary loud ticking sound that aggravates me, but otherwise, a very good bike
MattAwt
Colorado
Awesome Fat Tire
2 months ago
Awesome bike for both my son and grandson. One picked the Green the other was in love with the orange. One is 8 and other is 7. They love running over things in them.
Yes , I recommend this product
MattAwt
Colorado
Awesome
2 months ago
I bought my son and grandson these bikes and they absolutely love them. The bike is a solid build and great components. Highly recommend
Yes , I recommend this product