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Deal.ai › KFFKFF › Mountain Bikes
KFFKFF
KFFKFF 20-Inch Mountain Bike

KFFKFF 20-Inch Mountain Bike

3.9(58 ratings)

Best price now

$154.99at WalmartChecked 15 min ago

Compared across 7 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $154.99 at Walmart (checked Nov 14, 2026).
  • Checked at 7 stores.

Our take on the KFFKFF 20-Inch Mountain Bike

The KFFKFF 20-Inch Mountain Bike is a kids' fat-tire bike built on a high carbon steel frame with 20-inch wide tires, seven Shimano twist-grip speeds and dual disc brakes. It is sized for riders about 48 to 60 inches tall, roughly ages 10 to 12, and comes about 85% assembled with tools and gloves in the box. The rigid frame and fat tires favor snow, sand, gravel and mud over fast trail riding. Against lighter kids' mountain bikes it is heavy at 32.4 lbs, which makes climbing and carrying harder, and its 3.9-star rating from 58 buyers points to a mixed reception rather than a standout.

Best forKids ages 10 to 12 who want a rugged fat-tire bikeRiding on snow, sand, gravel and muddy pathsParents who want a mostly pre-assembled bikeRiders who want multi-speed gearing and disc brakes
Pros
  • Fat 20-inch tires roll over snow, sand and gravel
  • Seven Shimano twist-grip speeds for varied terrain
  • Dual front and rear disc brakes
  • About 85% pre-assembled with tools and gloves included
  • Fits a broad height band of 48 to 60 inches
Cons
  • Heavy at 32.4 lbs for a kids' bike
  • Rigid fork gives no suspension over bumps
  • High carbon steel frame is heavier than aluminum rivals
  • Assembly still needed for front wheel, saddle, pedals and front brake

KFFKFF 20-Inch Mountain Bike prices at every store

  • WalmartNew

    In stock

    $154.99Checked 15 min ago
    Visit Walmart
  • eBayNew

    In stockSold by dairuirui122_3

    $166.99Free shippingChecked 47 min ago
    Visit eBay
  • FactoryPureNew

    In stock

    $179.90Free shippingChecked 47 min ago
    Visit FactoryPure
  • TargetNew

    Availability unknown

    $179.90Free shippingChecked 47 min ago
    Visit Target
  • Home DepotNew

    Out of stock

    $179.90Free shippingChecked 47 min ago
    Visit Home Depot
  • VEVORNew

    Out of stock

    $179.90Free shippingChecked 47 min ago
    Visit VEVOR
  • WalmartNew

    Out of stockSold by UnbeatableSale Local

    $202.10Free shippingChecked 47 min ago
    Visit Walmart

KFFKFF 20-Inch Mountain Bike price history

Lowest price we've seen: $166.99 on Nov 14 at eBay. Tracked across 6 stores since Nov 14.

What reviewers say

  • 3.9 / 558 ratings

Buyers give it a middling 3.9 out of 5 from 58 ratings. Those who like it point to the fat tires and disc brakes for rough ground; others find it heavy and report assembly and quality issues.

What people mention
  • WeightCriticisedOwners say the 32.4 lb steel build is heavy for a child to pedal and lift.
  • TiresPraisedThe wide 20-inch tires are liked for grip on snow, sand and gravel.
  • BrakesPraisedDual disc brakes are seen as strong for a kids' bike.
  • AssemblyMixedSome find setup quick with the included tools; others say it still takes time and tuning.
  • Build qualityCriticisedSome buyers report rough finishing and parts needing adjustment out of the box.

About the KFFKFF 20-Inch Mountain Bike

This is a 20-inch mountain bike for children aged 10 to 12, with a fat-tire design for outdoor riding. It has a high carbon steel frame and a rigid fork with no suspension. Dual front and rear disc brakes handle stopping.

It has a 7-speed drivetrain with SHIMANO twist shifting and a Shimano rear derailleur. The wide tires are meant for varied terrain, including snow, trails, gravel, wet surfaces, mud, sand and beaches.

The bike arrives about 85% pre-assembled. To finish setup, attach the front wheel, secure the saddle, install the pedals, connect the front brake and mount the bike light. The tools needed and a pair of assembly gloves are included.

Model
VMB721
Bike type
Mountain bike, fat tire
Frame
High carbon steel
Suspension
Rigid
Wheel size
20 inch
Tires
20-inch wide tires
Speeds
7
Shifting
SHIMANO twist shifting
Derailleur
Shimano rear derailleur
Brakes
Dual front and rear disc brakes
Rider height
48 to 60 inches
Rider age
10 to 12 years
Terrain
Snow, trail
Assembly
85% pre-assembled

Specifications

color
SilverSource
actual_color
20" Carbon SteelSource
Wheel size
20 inchSource
Speeds
7 SpeedsSource

Questions and answers

Who is this bike sized for?
It suits riders about 48 to 60 inches tall, typically children aged 10 to 12.
What terrain is it built for?
The fat tires and rigid frame favor snow, sand, gravel, mud and wet paths rather than fast singletrack.
How much assembly is required?
It arrives about 85% assembled. You attach the front wheel, saddle, pedals, front brake and light, and tools and gloves are included.
Does it have suspension?
No. The fork is rigid, so the wide tires are the only cushioning over bumps.
How many gears does it have?
Seven, shifted with a Shimano twist-grip shifter.
What comes in the box?
The bike, an instruction manual, two reflectors, a screwdriver, an open wrench, two hex wrenches and a pair of gloves.
Where is the KFFKFF 20-Inch Mountain Bike cheapest?
At Walmart, for $154.99, as of our latest check.
What do buyers say about the KFFKFF 20-Inch Mountain Bike?
Rated 3.9 out of 5 from 58 ratings.
Where can I buy the KFFKFF 20-Inch Mountain Bike?
6 stores we checked sell it, including Walmart, eBay, FactoryPure, Home Depot, VEVOR.

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Buying guides that pick the KFFKFF 20-Inch Mountain Bike

  • Best 20-inch fat tire bikes for teenagers

Stores we've priced the KFFKFF 20-Inch Mountain Bike at

  • Target deals and prices
  • The Home Depot deals and prices
  • Walmart deals and prices

More from KFFKFF

Dimensions
57.5 x 25 x 33.1 in (1460 x 635 x 840 mm)
Weight
32.4 lbs (14.7 kg)
In the box
1 x mountain bike, 1 x instruction manual, 2 x reflectors, 1 x screwdriver, 1 x open wrench, 2 x hex wrenches, 1 x pair of gloves
Shifting type
SHIMANO Twist ShiftingSource
Frame material
High Carbon Steel FrameSource
Brake type
dual front and rear disc brakesSource
Tire type
20-inch wide tiresSource
Rider height
48 to 60 inches tallSource
Rider age
children aged 10–12Source
Assembly
85% pre-assembledSource
Product weight
32.4 lbs / 14.7 kgSource
Frame Type
Fat Tire
Suspension Type
Rigid
Usage Terrain
Snow
Age Range
10–12 years
Suitable Terrain
Snow, Trail
Typical Users
Children
Brake Highlights
Dual Disc Brakes
Number Of Speeds
7
Drivetrain Type
7-speed shifting system
Drivetrain Highlights
Multi-speed
Bike Type
Mountain Bike, MTB Bicycle, Sport Cycling Bicycle
Design Material
High Carbon Steel
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