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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 600 reviews
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Availability: Only 4 left in stock, order soon!
Fulfilled by Amazon
Arrives Friday, Jul 18
Order within 17 hours and 32 minutes
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Style: St


Color: Copper


Size: 17-Inch Frame


Features

  • FAT TIRE MOUNTAIN BIKE: Your introduction to the world of fat tire adventures awaits with the Argus by Mongoose. Featuring 26-inch wheels, this bike is perfect for riders from 5'7" - 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.
  • BUILT TOUGH: A durable steel hardtail frame and rigid fork are made to take a beating, while fat tires and drilled aluminum rims help keep the wheels lightweight.
  • SHIFT INTO GEAR: This 7-speed bike boasts Shimano twist shifters with rear derailleur for smooth shifting and the right gear for your ride. Mechanical disc brakes provide reliable stopping power in varied conditions, keeping riders in control.
  • 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 or ST, a kids and adults fat tire mountain bike built for all-terrain fun. With 20, 24 or 26-inch wheels, this adults, boys and girls mountain bike is ideal for riders between 4'4"" - 6'1"", 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 or steel frame is easy to handle while delivering big-time performance. Equipped with a Shimano drivetrain, this 7 or 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 or ST 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: 7


Color: Copper


Wheel Size: 26 Inches


Frame Material: Alloy Steel


Suspension Type: Rigid


Special Feature: Fat tire


Included Components: Bike


Bike Type: ‎Mountain Bike


Age Range (Description): ‎Adult


Brand: ‎Mongoose


Number of Speeds: ‎7


Color: ‎Copper


Wheel Size: ‎26 Inches


Frame Material: ‎Alloy Steel


Suspension Type: ‎Rigid


Special Feature: ‎Fat tire


Included Components: ‎Bike


Size: ‎17-Inch Frame


Brake Style: ‎Disc


Item Weight: ‎42 Pounds


Style: ‎St


Model Name: ‎Mongoose Argus ST Fat Tire Bike


Power Source: ‎manual winding


Wheel Material: ‎Alloy Steel


Warranty Type: ‎Limited


Assembly Required: ‎No


Bicycle Gear Shifter Type: ‎Twist Grip


Is Autographed: ‎No


Minimum User Height: ‎65 Inches


UPC: ‎038675223691


Bicycle Drivetrain Type: ‎Derailleur


Manufacturer: ‎Pacific Cycle, Inc.


Item Package Dimensions L x W x H: ‎61.5 x 31 x 9.5 inches


Package Weight: ‎24.04 Kilograms


Brand Name: ‎Mongoose


Warranty Description: ‎Limited Lifetime


Material: ‎Steel


Suggested Users: ‎unisex-adult


Part Number: ‎R8240AZ


Date First Available: September 1, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Jul 18

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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Similar Products

Top Amazon Reviews

    • 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
    • Perfect bike for a back country bow hunter
Style: Trail Color: Green Size: 19-Inch Frame
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
    • Such a great bike all around
Style: Trail Color: Green Size: 19-Inch Frame
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
    • 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
    • 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
    • Love the fat tires!
Style: St Color: Grey Size: 10.5-Inch Frame
Review Image by Pammie Pammie
Review Image by Pammie Pammie
We bought this bicycle for our 10 year old son. He had outgrown his and needed an upgrade so he could keep up with us on the trails. This bike couldn't be more perfect for him. He loves the fat tires because it looks a lot like mom and dad's bikes. The gears were a change of pace for him as his prior bike did not have them. However just a couple of bike rides around the block and he had it figured out. We appreciate the disk breaks as he can stop on a dime. The color is super cool too! He originally wanted an all black bike to match ours but he took one look at this grey color and changed his mind! Assembly was fairly simple. It took approximately 30 minutes and he was out in his first ride. ... show more
Reviewed in the United States on June 22, 2023 by Pammie Pammie
    • I DON'T KNOW RICK... LOOKS FAKE TO ME
Style: Trail Color: Green Size: 15-Inch Frame
Review Image by Loliaz Loliaz
Review Image by Loliaz Loliaz
Review Image by Loliaz Loliaz
Ok, here I go.... I don't know where to start. I had pretty high good expectations with this bike. It is certainly a very nice looking bike but.... one of the things I decided to buy this one was because in the description says ITEM WEIGHT 30 LBS. No, isn't. It is almost 37 Lbs. It was pretty easy to assemble but it needs some adjustments anyway by a professional; the chain and speed changes, is not getting the most little disc. I tested it today, did a ride around 10miles. The last 2 miles the pedals had a weird sound combined with some other weird sounds in the chain. The brakes sounds sandy from the very beginning. It has some peelings with some sharp liftings all around the metal rim in both wheels. Looks like whoever did mount the wheels, they did a sloppy job; they used a sharped tool that lifted the black coating and left exposed the metal. Just because of this, I think I'll be returning this Bike. See pictures attached from both wheels. I'll keep testing it a little bit more and let you know guys what else. ... show more
Reviewed in the United States on August 7, 2023 by Loliaz Loliaz

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