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Mongoose

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
Condition: mongoose.com
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Availability: 20 left in stock
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Style: Trail


Color: Green


Size: 17-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 5'7" - 5'10" 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.

Bike Type: Mountain Bike


Age Range (Description): Adult


Brand: Mongoose


Number of Speeds: 16


Color: Green


Wheel Size: 26 Inches


Frame Material: Aluminum


Suspension Type: Front


Special Feature: Aluminum Frame, fat tire, mountain bike


Included Components: Bike


Bike Type: ‎Mountain Bike


Age Range (Description): ‎Adult


Brand: ‎Mongoose


Number of Speeds: ‎16


Color: ‎Green


Wheel Size: ‎26 Inches


Frame Material: ‎Aluminum


Suspension Type: ‎Front


Special Feature: ‎Aluminum Frame, fat tire, mountain bike


Included Components: ‎Bike


Size: ‎17-Inch Frame


Brake Style: ‎Disc


Specific Uses For Product: ‎Trail


Item Weight: ‎21.3 Kilograms


Style: ‎Trail


Model Name: ‎Argus


Power Source: ‎Pedal power


Wheel Material: ‎Aluminum


Seat Material Type: ‎Nylon


Warranty Type: ‎Limited


Assembly Required: ‎No


Bicycle Gear Shifter Type: ‎Trigger


Minimum User Height: ‎67 Inches


Derailleur Configuration: ‎Front and Rear


UPC: ‎038675223677


Bicycle Drivetrain Type: ‎chain drive


Manufacturer: ‎Pacific Cycle, Inc.


Frame Size: ‎17-Inch Frame


Frame Type: ‎Hard Tail


Item Package Dimensions L x W x H: ‎61 x 30 x 10 inches


Package Weight: ‎21.32 Kilograms


Brand Name: ‎Mongoose


Warranty Description: ‎Limited Lifetime


Material: ‎Aluminum


Suggested Users: ‎unisex-adult


Date First Available: September 3, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: within 30 days

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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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Such a great bike all around
Review Image by Pauly.FB6 Pauly.FB6
Review Image by Pauly.FB6 Pauly.FB6
Review Image by Pauly.FB6 Pauly.FB6
Review Image by Pauly.FB6 Pauly.FB6
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
    • Perfect bike for a back country bow hunter
Where I chase elk, E-bikes aren't allowed. I agree with the rule. Too many hunters are super lazy these days, shooting from the road, from a truck, or trespassing through private property. I digress... Anyway, this bike is relatively light. But not the cheap kind of light. The kind of light that comes from lots of R&D where a focus was geared towards building with the highest quality parts, instead of adding unnecessary comforts like shocks.(tires properly inflated are all the suspension you should need... more parts equals more stuff to break or go wrong leaving you stranded or pushing your bike through the back country) the frame is rigid, basic, and bombproof. It shifts through all gears effortlessly, rides smooth and brakes on a dime. Mongoose has been around for a while. I don't think the are going anywhere. There are definitely less expensive options, but you get what you pay for. I am happy with my purchase, and am sure this bike will help me fill my meat freezer for years to come. ... show more
Reviewed in the United States on November 26, 2024 by Chris
    • Great Bike Kids love them
Style: St Color: Blue Size: 12-Inch Frame
Great Bike has lasted 5 years and going strong
Reviewed in the United States on January 1, 2026 by Amazon Customer
    • Great entry fat bike, but tires need deeper tread
Style: St Color: Copper Size: 17-Inch Frame
Review Image by C C
Review Image by C C
This bike is a good value for the money, and I would buy it again as a entry level fat bike for my child getting into fat biking with me. However it’s not perfect. 1) assembly is not easy. If you don’t have experience assembling a bike it will be tough for you. After I assembled it, the shifting had to be adjusted quite a bit which someone unfamiliar with these adjustments would be totally lost. Same with the disc brakes rubbed badly and I had to adjust the placement of them. 2) it is very heavy, just know that. Comes into play when transporting on a bike rack or climbing an incline, especially for a teen getting into biking. 3) the fat tires are 4.0” wide which is nice, but the tread depth is not very deep. This translates to not the best grip on snowy trails. I’d say maybe half the depth of the tread knobs compared to what came on my Trek Farley fatty. My son slipped out and fell 3-4 times in areas I have grip for days on my bike. But new tires are very expensive, at least $100/tire, so upgrading tires on this price-point bike is hard to justify. If it came with knobbier tires it would be an extremely excellent entry snow bike!! 4) it is very good looking and I’d recommend it for a cheap intro into fat biking. But be weary of the tires if you’re using it on groomed snow trails, but it’s cool! ... show more
Reviewed in the United States on January 5, 2021 by C C
    • Fun to ride and feels safe and strong on the road
Style: St Color: Copper Size: 17-Inch Frame
Review Image by Mike Nova Mike Nova
Great bike looks beautiful in person feels smooth on the road everything came no missing parts easy to assemble and very fun to ride!
Reviewed in the United States on December 17, 2025 by Mike Nova Mike Nova
    • Junk
Style: St Color: Grey Size: 10.5-Inch Frame
It didn't come with none of the hardware to put it together and should have come with training wheels because it was so small. But because I'm a fedex delivery man and just now putting it together it's to late for anything else. 300 dollars for trash. Thanks
Reviewed in the United States on December 24, 2025 by Dale P.
    • 17 inch argus st model highly recommend
Style: St Color: Copper Size: 17-Inch Frame
Review Image by Lee Lee
Review Image by Lee Lee
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
    • Nice Fat Bike
Style: St Color: Copper Size: 17-Inch Frame
Nice fat tire bike. The materials feel nice and well built. Not cheap.
Reviewed in the United States on November 30, 2025 by Samuel B Wentzel

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