Mongoose Malus Fat Tire Mountain Bike 26 Inch
- 26 inch wheels, 4 inch wide knobby tires
- 7 speeds, Shimano rear derailleur, trigger shifter
- Disc brakes
- Alloy steel frame, no suspension
- 35 pounds
- 18 inch frame, minimum rider height 64 inches
- Limited lifetime warranty
Last refreshed Jun 21, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A rigid fat tire mountain bike with seven speeds and disc brakes for unpaved trails. It has no suspension, and the item type calls it a cruiser.
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ASIN: B01NB1KSILCategory: Mountain Bikes
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Overview
Unpaved trails and mountain terrain are the intended ground for this fat tire bike, which rolls on wide knobby tires with a steel frame and a rear derailleur.
Wide tires add cushion and traction on loose surfaces, and disc brakes plus trigger shifting give a conventional mountain bike layout. The limitation is a fixed front end with no suspension and a build on the heavy side.
Who it's for
Casual trail rides, loose surfaces and neighborhood use for adults taller than the listed minimum height. Technical downhill riding needs suspension, which this bike does not have.
Pros and cons
- Wide knobby tires
- Limited lifetime warranty
- Heavy steel build
- Item type says cruiser
Performance notes
Wide, low-pressure tires spread weight over a larger contact patch, which helps on sand, gravel and snow but adds rolling resistance on pavement. A rear derailleur with seven speeds gives a modest range for hills. Disc brakes give consistent stopping power in wet weather.
Where it stands among mountain bikes
- #4 most-searched brand and model of the 15 mountain bikes lines we track (by search demand, not sales).
From the specs of the 99 mountain bikes we list; not a test result.
Specifications
| Brand | Mongoose |
|---|---|
| Dimensions & fit | |
| Size | 18 inch / Medium |
| Wheel Size | 26 inches |
| Minimum User Height | 64 incheshigher than 62% of 38 mountain bikes |
| Item weight | 35 pounds |
| Capacity & performance | |
| Number Of Speeds | 7 |
| Bicycle Drivetrain Type | Derailleur (rear) |
| Bicycle Gear Shifter Type | Trigger |
| Construction & materials | |
| Frame Material Type | Alloy steel |
| Wheel Material | Alloy |
| Seat Material | Polyurethane (PU) |
| Color | Silver/Yellow |
| Warranty & support | |
| Warranty Description | Limited lifetime |
| Other details | |
| Suspension Type | None |
| Brake Style | Disc |
| Bike Type | Mountain bike |
| Intended Riding Terrain | Mountain terrain, unpaved trails |
| Skill Level | Intermediate |
| Is Assembly Required | Not required |
Closest rivals on specs
Frequently asked questions
Is the Mongoose Malus a cruiser or a mountain bike?
The bike type is mountain bike, though the item type name says cruiser. The specs list trail use on mountain terrain and unpaved trails.
Does the Mongoose Malus have suspension?
No. The suspension type is listed as none.
Does the Mongoose Malus come assembled?
The listing says assembly is not required.