Mongoose Malus Fat Tire Mountain Bike 26 Inch
- Size: 18 inches
- Wheel Size: 26 inches
- Minimum User Height: 64 inches
- Brake Style: Disc
Last refreshed Jun 21, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A heavy, stable entry-level fat tire bike that handles snow, sand and hills well for the price, with a real risk of shipping damage and some low quality small parts.
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ASIN: B01NB1KSILCategory: Mountain Bikes
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Overview
A steel-frame fat tire mountain bike built around 26 inch wheels and 4 inch wide knobby tires, running a 7-speed drivetrain with a Shimano rear derailleur and front and rear disc brakes, sized for riders roughly 5 feet 4 inches to 6 feet 2 inches tall.
A few buyers specifically choose it as a base for e-bike conversions, since the steel frame can be welded and modified for a motor mount, something an aluminum frame would not allow.
- 26 inch wheels with 4 inch wide knobby tires
- Steel mountain-style fat tire frame, fits riders 5'4 to 6'2
- 7-speed drivetrain with Shimano rear derailleur
- Front and rear disc brakes
Who it's for
Fits riders wanting an entry-level fat tire bike for mixed terrain, snow or sand, including buyers planning an e-bike conversion. Less suited to riders wanting a lightweight bike, since the steel frame and wide tires add noticeable weight and effort to turn.
Pros and cons
- Stable traction in snow, sand and loose gravel
- Steel frame climbs hills, holds heavier riders
- Popular, weldable base for e-bike conversion projects
- Harder to turn and roll than standard bikes
- Shipping damage reported to derailleur and gear plates
- Some parts, like the front axle, arrived poorly finished
Performance notes
The 4 inch wide knobby tires and steel frame favor stability and traction over agility. Several buyers found it climbed hills better than expected for its weight, and it performed well in snow, sand and loose gravel.
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 incheslower than 88% of 49 mountain bikes |
| Wheel Size | 26 inches |
| Minimum User Height | 64 incheshigher than 58% of 46 mountain bikes |
| Item Weight | 35 poundslower than 82% of 39 mountain bikes |
| Capacity & performance | |
| Number Of Speeds | 7 |
| Bicycle Drivetrain Type | Derailleur |
| Bicycle Gear Shifter Type | Trigger |
| Age Range Description | Adult |
| Power & efficiency | |
| Power Source | Pedal |
| Construction & materials | |
| Frame Material Type | Alloy Steel |
| Wheel Material | Alloy |
| Seat Material | Polyurethane (PU) |
| Included components | |
| Included Components | Bicycle |
| Warranty & support | |
| Warranty Type | Limited |
| Warranty Description | Limited lifetime |
| Other details | |
| Brake Style | Disc |
| Bike Type | Mountain Bike |
| Intended Riding Terrain | Mountain Terrain, Unpaved Trails |
| Derailleur Configuration | Rear |
| Skill Level | Intermediate |
| Is Assembly Required | No |
| Is Autographed | No |
| Specific Uses For Product | Trail |
| Style Name | Mountain |
| Item Type Name | Cruiser Bicycle |
Closest rivals on specs
Frequently asked questions
What size riders fit the Mongoose Malus?
The steel frame is built for riders roughly 5 feet 4 inches to 6 feet 2 inches tall.
Does the Mongoose Malus have disc brakes?
Yes, it has both front and rear disc brakes.