Bike Type | Mountain Bike |
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Age Range (Description) | Adult |
Brand | Mongoose |
Number of Speeds | 7 |
Color | Matte Black |
Wheel Size | 26 Inches |
Frame Material | Steel |
Suspension Type | Rigid |
Special Feature | fat tire, mountain bike |
Included Components | Bike |
Size | 18-Inch Frame |
Brake Style | Disc |
Specific Uses For Product | Trail |
Item Weight | 42.9 Pounds |
Model Name | Mongoose malus |
Item Package Dimensions L x W x H | 61 x 30.5 x 10 inches |
Package Weight | 25.4 Kilograms |
Brand Name | Mongoose |
Warranty Description | Limited Lifetime |
Material | Steel |
Suggested Users | unisex-adult |
Manufacturer | Pacific Cycle, Inc. |
Part Number | R5714C |
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73% positive over last 12 months
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Mongoose Malus Adult Fat Tire Mountain Bike, 26-Inch Wheels, 7-Speed, Twist Shifters, Steel Frame, Mechanical Disc Brakes, Multiple Colors
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Enhance your purchase
Bike Type | Mountain Bike |
Age Range (Description) | Adult |
Brand | Mongoose |
Number of Speeds | 7 |
Color | Matte Black |
Wheel Size | 26 Inches |
Frame Material | Steel |
Suspension Type | Rigid |
Special Feature | fat tire, mountain bike |
Included Components | Bike |
About this item
- Make sure this fits by entering your model number.
- Mongoose mountain-style frame is ready to take on the trail. 26-inch wheels fit riders 64 to 74 inches tall
- 7-speed twist shifters provide quick, precise gear changes
- Front and rear disc brakes deliver secure stopping power
- Aluminum crank arms provide optimal gearing
- 26 x 4-inch all terrain fat tires provide extra stability on dirt, sand, and snow
Frequently bought together
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From the manufacturer

Year-Round Riding on a Mongoose Malus Fat Tire Mountain Bike
Wow did you see what that guy is riding? What was that thing? The tires are huge! Watch as he glides over sand, dirt and snow. See the glee he has as he bounces over embankments and boings over rocks. The Mongoose Malus 26-inch fat tire bike has arrived to save you from the doldrums and put a smile on the faces of all those you pass by. Built with 4 1/4-inch tires (earning the name fat) on a supersized beach cruiser frame, there is plenty of clearance to make it rideable on virtually any terrain. Plus, the Malus has 7-speeds with a rear derailleur and front and rear disc brakes so it still has its vein of practicality. Fat tires are all the rage and the Malus is a great bike to add to your stable, giving you the capability to ride year-round. There is nothing you can't do on a Mongoose and almost nowhere you can't go on the Malus.

Product Description
The bike that people will notice. The tires are huge. Watch as it glides over sand, dirt and snow. See the ease has as it bounces over embankments and boings over rocks. The Mongoose Malus 26-inch fat tire bike has arrived to save you from the doldrums and put a smile on the faces of all those you pass by. Built with 4-inch tires (earning the name fat) on a supersized beach cruiser frame and there is plenty of clearance to make it rideable on virtually any terrain. Plus, the Malus has 7-speeds with a rear derailleur and front and rear disc brakes so it still has its vein of practicality. Fat tires are all the rage and the Malus is a great bike to add to your stable, and to get out there and have a little fun on. There is nothing you can't do on a Mongoose and almost nowhere you can't go on the Malus.
Product information
Technical Details
Additional Information
ASIN | B086ZHRVDT |
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Customer Reviews |
4.5 out of 5 stars |
Best Sellers Rank | #55,988 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #7 in Complete Cruiser Bikes |
Date First Available | April 10, 2020 |
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Videos
Videos for this product
0:13
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Customer Review: Missing wheel bearing
Frank D Taylor
Videos for this product
0:57
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Mongoose Malus Adult Fat Tire Mountain Bike
Pacific Cycle Inc.
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Customer reviews
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Reviewed in the United States on December 15, 2022
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Everything else that is of questionable quality gets replaced. And surprisingly that is very little. Brake pads, rear axel, ball bearings at both wheels and inner tubes. And these parts were kept on the bike until the heavier, more powerful conversation wore them out. Everything else is good.
I rode it as a bicycle for a bit before the conversion, even put on a 3x mt bike chainring to lower the gearing, to high stock. It was fun. But I'm 9000' in the Rockies and the conversion was the main intent.
For the money you cannot go wrong.

Reviewed in the United States ๐บ๐ธ on December 15, 2022
Everything else that is of questionable quality gets replaced. And surprisingly that is very little. Brake pads, rear axel, ball bearings at both wheels and inner tubes. And these parts were kept on the bike until the heavier, more powerful conversation wore them out. Everything else is good.
I rode it as a bicycle for a bit before the conversion, even put on a 3x mt bike chainring to lower the gearing, to high stock. It was fun. But I'm 9000' in the Rockies and the conversion was the main intent.
For the money you cannot go wrong.

You need to know that it is a heavy bike and anything with the word fat in it should immediately stop you from complaining. It's hefty.
I love it. If you want to power through the pedal like I do it's great. If you, like me, could peddle all you want on a normal sized bike and still feel like your not moving than a fat bike might be for you. Bumps are not an issue. Feels like a monster truck as you ride.
The problem, your buying a cheaper bike. Mine came with a bent bottom bearing or actually the spindle in the bottom bearing. They knew this during assembly. How do I know that. Well the bottom bearing was left loose to keep it from causing issues. How did I figure this out. A 7 mile bike ride and a mysterious clicking sound took me to a local bike shop where a very kind bike mechanic showed me that it was loose and the bent shaft was causing issues. And the bearings weren't really greased very well.
So ... It's a great bike but you should get it serviced before riding. I know this isn't ideal but unless you plan to pay $1000 or more you should expect this kind of thing.
Except for the slight problem with shifting to the lowest three gears the bike was still functional so I wasn't very concerned about these problems until the next day, when I started to ride the bike and shifted from 4th gear to first and continued pedaling. I then heard clashing of metal parts and felt the chain derail. I stopped the bike, got off it and examined the rear derailer. I found it had become so warped that it no longer could function (the uppermost gear of the derailer mechanism had warped inwards towards the spokes to an angle around 35 degrees away from straight up, making it impossible for that gear to move the chain). I had to walk the bike back to my house, which was around 100 meters away.
A harsh lesson seems apparent: I should have done something to correct the warps in the derailer parts before riding the bike any more.
I've been able to correct the bend to the rear left dropout. I removed the rear wheel and placed the bike on its left side, then rested the left chain stay on a stack of three house bricks (such that the left rear dropout extended a couple of inches over the edge of the pile of bricks). I then grabbed the left dropout with a large adjustable wrench and pushed hard downwards. The dropout (which had been bent inwards towards the rear tire around 3mm at the dropout's end) became straight again. The warps in the two disks around the pedal gear don't seem to need straightening
The warps in the long metal plate of the rear derailer appear to me to be far more difficult to correct. I tried to use the amazon site to ask the bike maker to send me photos of a normal, undamaged rear derailer to help me make the needed corrective bends.
The amazon site seems to allow no way for one to send such a request to the bike's maker. I used the option of asking to make a return to send my simple request (for photos) with the message-entry blank, making it clear in my message that I only wanted some photos, and did NOT want to return anything. While doing this the web site bizarrely logged me off twice (I'm certain I did nothing to warrant this).