Mongoose Dolomite Fat Tire Mountain Bike Blue
- 26 inch wheels, 4 inch knobby tires
- 7 speeds, twist grip, rear derailleur
- Front and rear disc brakes
- Rigid steel frame
- 52 pounds item weight
- 301 pounds maximum weight
- Limited lifetime warranty
Last refreshed Jun 21, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A steel framed fat tire mountain bike with seven speeds and disc brakes at both wheels, for unpaved trails. It is heavy and ships to be assembled, so plan time for the build.
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ASIN: B00J7J40TMCategory: Mountain Bikes
Overview
A rear derailleur works the seven speeds on this fat tire mountain bike, shifted by a twist grip and driven through a chain. Wide knobby tires and an alloy steel frame carry the rider.
Wide knobby tires and disc brakes at both ends handle loose surfaces, and the generous weight limit covers bigger riders. The listing marks the bike as rigid with no suspension and fairly heavy, and it ships to be assembled.
Who it's for
Adult riders of average to tall height who ride dirt, sand and unpaved paths. Riders shorter than the stated range, or those chasing low weight or suspension, should look at other builds.
Pros and cons
- Wide knobby tires
- Disc brakes front and rear
- High weight limit
- Limited lifetime warranty
- Rigid, no suspension
Performance notes
Wide tires spread the bike weight over a bigger patch, which helps on loose or soft ground, and low tire pressure supplies the only cushioning since the frame is rigid. A rear derailleur shifts the chain across the sprockets by twist grip. Disc brakes act on rotors, not rims, so wet weather matters less.
Where it stands among mountain bikes
- #2 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 | 17-Inch/Mediumlower than 89% of 47 mountain bikes |
| Wheel Size | 26 Inches |
| Minimum User Height | 5 feet |
| Maximum Weight Recommendation | 301 poundshigher than 72% of 47 mountain bikes |
| Tire width | 4 inches |
| Item weight | 52 pounds |
| Capacity & performance | |
| Number Of Speeds | 7 |
| Bicycle Gear Shifter Type | Twist Grip |
| Construction & materials | |
| Frame Material Type | Alloy Steel |
| Seat Material | Vinyl |
| Warranty & support | |
| Warranty Description | Limited Lifetime Warranty |
| Other details | |
| Suspension Type | Rigid |
| Brake Style | Disc |
| Derailleur Configuration | Rear |
| Is Assembly Required | Yes |
Closest rivals on specs
Frequently asked questions
What size is the Mongoose Dolomite and who does it fit?
The size is listed as 17-inch medium. The description says it is sized for adult riders 5 feet 6 inches to 6 feet tall, and the minimum user height field says 5 feet.
Does the Mongoose Dolomite have suspension?
No. The suspension type is listed as rigid.
How much assembly does the Mongoose Dolomite need?
The listing says assembly is required and that the bike ships ready to be assembled.