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Mongoose Argus Trail or ST Fat Tire Mountain Bike, 20, 24 or 26 Inch Bike for Kids and Adults, 7 or 16 Speed, Aluminum or Steel Frame, Knobby Mountain Fat Tires, Mechanical Disc Brakes

  • Based on 618 reviews
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Availability: Only 4 left in stock, order soon!
Fulfilled by e-Global Consulting

Arrives Oct 29 – Nov 4
Order within 10 hours and 1 minute
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Style: Trail


Color: Green


Size: 19-Inch Frame


Features

  • FAT TIRE MOUNTAIN BIKE: Come down with fat tire fever on the Argus by Mongoose. Featuring 26-inch wheels, this bike is perfect for riders from 5'10" - 6'1" tall. Roll over all sorts of difficult terrain with ease.
  • ALL-TERRAIN, ALL-SEASON: 4-inch-wide knobby fat tires deliver massive grip, giving you control even on loose sand, deep snow, gravel and sketchy trails where others might slip up.
  • LIGHTWEIGHT FAT: Fat doesn't have to mean heavy. A lightweight yet durable Tectonic T2 aluminum hardtail frame with an aluminum rigid fork, paired with drilled rims, keeps those extra pounds off and your ride agile.
  • SHIFT INTO GEAR: This 16-speed bike boasts a Shimano 2x8 drivetrain for smooth shifting and the right gear for your ride. Mechanical disc brakes provide reliable stopping power in varied conditions, giving riders control on rough terrain.
  • KNOW YOUR ROOTS: As one of the OGs in BMX and action sports, Mongoose has helped bring this movement to the world. For over 50 years, we've been all about epic rides and pushing limits and we're just getting started.

Description

Adventure starts where the pavement ends with the Mongoose Argus Trail, a kids fat tire mountain bike built for all-terrain fun. With 20-inch wheels, this boys and girls mountain bike is ideal for riders between 4'3"" - 5', perfect for bringing young explorers into the action. Its aluminum rims and 4-inch- wide fat tires provide the traction and durability needed to conquer dirt, gravel, sand, and snow with confidence. The lightweight yet tough aluminum frame is easy to handle while delivering big-time performance. Equipped with a Shimano 2x8 drivetrain, this 16-speed bike ensures smooth shifting and a wide gear range for tackling varied terrain. Mechanical disc brakes provide reliable all-weather stopping powers, keeping kids in control no matter the ride. Whether climbing hills, cruising the trail, or charging through the elements, the Argus Trail is ready for the adventure. Assembly is easy with a few common household tools and the included instruction guide. At Mongoose, we know our roots – as pioneers in BMX and action sports for over 50 years, we're dedicated to delivering an epic ride every time. Get ready to push the limits.

Specs & Other Info

Specification Details
Type of Bicycle Mountain Bicycle
Suitable Age Group Adults
Manufacturer Mongoose
Gear Options 16 Speed levels available
Color Scheme Lush Green
Diameter of Wheels 26 Inches
Main Frame Composition High-Quality Aluminum
Type of Suspension Non-Suspension (Rigid)
Unique Features Wide (Fat) Tires, Durable Aluminum Frame
Package Includes Complete Bicycle
Frame Size 19 inches
Brake System Disc Brakes
Intended Use Trail Riding
Product Weight 30 Pounds
Style Trail-Bike
Model Name Argus
Package Dimensions 62 x 30 x 10 inches
Warranty Terms Limited Lifetime Warranty
Suggested Users Unisex Adults
Manufacturer Details Pacific Cycle, Inc.
First Released September 3, 2020

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Oct 29 – Nov 4

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.


These product reviews reveal an overall very positive view of the bike, with most customers highlighting its great look, cool style, good ride and durability. It's suitable for both adults and children, providing a comfortable and fun biking experience. However, there are reliability concerns with some mention of the chain needing professional adjustment and other minor defects.

Pros

  • 🚲 Great stylish look that turns heads
  • 🌟 Durable and functional construction
  • 🛹 Suitable for both adults and children
  • 🏞️ Perfect for trail rides
  • 🔧 Easily adjustable parts

Cons

  • ⚙️ Chain and speed changes may require professional adjustment
  • 🔊 Some units have reported odd sounds from pedals and chain
  • 🏋️ Heavier than advertised
  • 🧐 Some users reported minor defects and sloppy assembly

Should I Buy It?

If you are searching for a stylish and efficient bicycle suitable for trail rides and daily use, this bike could fit the bill. Despite some minor concerns about the chain mechanism and some defective units, the overwhelmingly positive reviews suggest that these are exceptions rather than the norm. Thus, it would seem prudent to consider purchasing this bike.


  • Such a great bike all around
Style: Trail Color: Green Size: 19-Inch Frame
This bike is even better than I was expecting. I got the 19” and it’s great. I’m on the taller side of 6’2 and the bike fits me perfectly. I’ve ridden it both with the saddle all the way down and with it fully extended, and it’s great both ways. I switch it up for the different types of riding I do. I also stripped almost all of the stickers off, and I just kept the main “Argus trail” on the top tube and the “M” on the head tube. Everything else is gone and it looks so good imo. Everything works smoothly, and the seat is even somewhat comfortable. And it just looks so awesome. Solid parts and construction, and it came safety wrapped to the absolute limit. Foam sheets wrapped around everything and taped, then cardboard paper wrapped around that and taped, then zip tied together in a box with spacers so nothing moved around. The gears might need some tuning which is normal, but if you don’t know how, there’s videos on YouTube that will walk you through the process. A++ all around and great value for the money Update: This bike is still amazing. I’ve ridden through just about everything you can imagine, except for snow cuz it isn’t winter yet. ... show more
Reviewed in the United States on August 5, 2023 by Pauly.FB6 Pauly.FB6

  • Great bike
Style: Trail Color: Green Size: 19-Inch Frame
This bike looks amazing, and rides well
Reviewed in the United States on August 11, 2025 by JB

  • love it
Style: St Color: Copper Size: 17-Inch Frame
Amazing bike, so glad I got this for my daily rides, great brakes as well, perfect size for me.
Reviewed in the United States on September 5, 2025 by Marcus Thomas Marcus Thomas

  • 17 inch argus st model highly recommend
Style: St Color: Copper Size: 17-Inch Frame
So far on day 1 it gets 5 stars. Arrived on time without any damages. Assemhly was very easy insert the seatpost/seat, bolt on the front tire, attach your right and left pedals which come with labels because your left pedal is threaded opposite so lefty tighty, righty loosy the right pedal is standard righty tighty. I am about 5,10 185 pounds and the 17 inch frame fits me perfectly! Had to slightly adjust the front break pads to eliminate a slight rub on the rotors but it wasn't hard at all. Out of the box the shifter needed 0 adjustment and shifts very smooth however it is a grip shifter so its a little easy to accidentally shift gears when you aren't trying to. Other than that the bike is very solid and rides very nice the brakes aren't amazing but its easy to swap your brake pads down the road. All in all i highly recommend this bike. ... show more
Reviewed in the United States on August 10, 2025 by Lee Lee

  • Lightweight, but sturdy
Style: Trail Color: Green Size: 19-Inch Frame
Good but peddle assembly makes clicking noise
Reviewed in the United States on July 1, 2025 by Tank39

  • Mongoose 20” Fat Tire Bike
Style: St Color: Grey Size: 10.5-Inch Frame
This has been a pretty great bike. The derailed was a little out of wack but was able to fix easily. My boy gets a lot of compliments on it. Perfect size for my 8 year old with room to grow on it.
Reviewed in the United States on February 13, 2025 by BigShow

  • Low Quality
Style: Trail Color: Green Size: 19-Inch Frame
Quality Control Issues Bought two of these bikes both ended up having shifting problems within a few days. Following manual and taking to the qualified bike shop did not reseolve the issue. These are prices way too much for the quality of components that you get, patricualry the chain, rear cassette and deraileur. Ended up returning both bikes with same issues. ... show more
Reviewed in the United States on July 15, 2025 by Vsevolod Y Rudov

  • Well worth the price!
Style: Trail Color: Green Size: 19-Inch Frame
Why did you pick this product vs others?: Visual appeal! Size: This bike is perfect for someone tall! I was skeptical in the beginning prior to receiving the bike. But I don’t feel tall enough for it. I’m 6’2. Weight: Very lightweight!
Reviewed in the United States on July 7, 2025 by Phillip H

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